delta/snappy-git.git, branch fix_rc github.com: google/snappy Convert DCHECK to assert. 2019-01-08T15:02:24+00:00 Victor Costan pwnall@chromium.org 2019-01-08T14:45:37+00:00 b2adaed0ccc1d607ed1044828782dd750dacaa15 






Wrap BMI2 instruction usage in support checks.
2019-01-08T14:44:11+00:00

costan
costan@google.com

2019-01-08T14:06:34+00:00

4f0adca400ed519c463f8bbc3031296e38dd746d

A previous version of this was submitted and rolled back due to breakage
-- an attempt to accommodate Visual Studio resulted in compiler errors
on GCC/Clang with -mavx2 but without -mbmi2. This version makes the BMI2
support check more strict, to avoid the errors.

A previous CL introduced _bzhi_u32 (part of Intel's BMI2 instruction
set, released in Haswell) gated by a check for the __BMI2__ preprocessor
macro. This works for Clang and GCC, but does not work on Visual Studio,
and may not work on other compilers.

This CL plumbs the BMI2 support checks through the CMake configuration
used by the open source build. It also replaces the <x86intrin.h>
header, which does not exist on Visual Studio, with the more scoped
headers <tmmintrin.h> (for SSSE3) and <immintrin.h> (for BMI2/AVX2).
Asides from fixing the open source build, the more scoped headers make
it slightly less likely that newer intrinsics will creep in without
proper gating.





A previous version of this was submitted and rolled back due to breakage
-- an attempt to accommodate Visual Studio resulted in compiler errors
on GCC/Clang with -mavx2 but without -mbmi2. This version makes the BMI2
support check more strict, to avoid the errors.

A previous CL introduced _bzhi_u32 (part of Intel's BMI2 instruction
set, released in Haswell) gated by a check for the __BMI2__ preprocessor
macro. This works for Clang and GCC, but does not work on Visual Studio,
and may not work on other compilers.

This CL plumbs the BMI2 support checks through the CMake configuration
used by the open source build. It also replaces the <x86intrin.h>
header, which does not exist on Visual Studio, with the more scoped
headers <tmmintrin.h> (for SSSE3) and <immintrin.h> (for BMI2/AVX2).
Asides from fixing the open source build, the more scoped headers make
it slightly less likely that newer intrinsics will creep in without
proper gating.







Optimize decompression by about 0.82%.
2019-01-08T14:35:12+00:00

nafi
nafi@google.com

2019-01-08T00:52:08+00:00

46768e335d6454855aed17ba3162b5903395bfba

Assembly difference: https://godbolt.org/z/cvlH9b

name                                          old time/op             new time/op             delta
BM_UFlat/0      [html             ]            42.3µs ± 0%             42.5µs ± 0%   +0.57%          (p=0.008 n=5+5)
BM_UFlat/1      [urls             ]             590µs ± 0%              575µs ± 0%   -2.60%          (p=0.008 n=5+5)
BM_UFlat/2      [jpg              ]            7.16µs ± 1%             7.15µs ± 1%     ~             (p=0.841 n=5+5)
BM_UFlat/3      [jpg_200          ]              131ns ± 0%              129ns ± 0%   -1.41%          (p=0.008 n=5+5)
BM_UFlat/4      [pdf              ]            8.21µs ± 0%             8.22µs ± 1%     ~             (p=0.690 n=5+5)
BM_UFlat/5      [html4            ]             222µs ± 0%              223µs ± 0%     ~             (p=0.841 n=5+5)
BM_UFlat/6      [txt1             ]             193µs ± 0%              192µs ± 0%     ~             (p=0.095 n=5+5)
BM_UFlat/7      [txt2             ]             171µs ± 0%              169µs ± 0%   -0.83%          (p=0.008 n=5+5)
BM_UFlat/8      [txt3             ]             511µs ± 0%              510µs ± 0%     ~             (p=0.841 n=5+5)
BM_UFlat/9      [txt4             ]             717µs ± 0%              707µs ± 0%   -1.42%          (p=0.008 n=5+5)
BM_UFlat/10     [pb               ]            38.8µs ± 0%             39.3µs ± 0%   +1.26%          (p=0.008 n=5+5)
BM_UFlat/11     [gaviota          ]             190µs ± 0%              189µs ± 0%   -0.43%          (p=0.032 n=5+5)
BM_UFlat/12     [cp               ]            14.3µs ± 0%             14.2µs ± 0%   -0.92%          (p=0.008 n=5+5)
BM_UFlat/13     [c                ]            7.35µs ± 1%             7.30µs ± 0%   -0.66%          (p=0.032 n=5+5)
BM_UFlat/14     [lsp              ]            2.30µs ± 1%             2.28µs ± 0%     ~             (p=0.056 n=5+5)
BM_UFlat/15     [xls              ]             983µs ± 0%              904µs ± 0%   -7.99%          (p=0.008 n=5+5)
BM_UFlat/16     [xls_200          ]              213ns ± 0%              213ns ± 1%     ~             (p=0.690 n=5+5)
BM_UFlat/17     [bin              ]             278µs ± 0%              274µs ± 0%   -1.56%          (p=0.008 n=5+5)
BM_UFlat/18     [bin_200          ]              101ns ± 0%              101ns ± 1%     ~             (p=1.000 n=5+5)
BM_UFlat/19     [sum              ]            29.4µs ± 1%             28.0µs ± 1%   -4.98%          (p=0.008 n=5+5)
BM_UFlat/20     [man              ]            2.97µs ± 0%             2.97µs ± 0%     ~             (p=0.421 n=5+5)
BM_UValidate/0  [html             ]            33.6µs ± 0%             33.6µs ± 0%     ~             (p=0.548 n=5+5)
BM_UValidate/1  [urls             ]             443µs ± 0%              441µs ± 0%   -0.43%          (p=0.016 n=4+5)
BM_UValidate/2  [jpg              ]              146ns ± 0%              144ns ± 0%   -1.63%          (p=0.008 n=5+5)
BM_UValidate/3  [jpg_200          ]             98.6ns ± 0%             95.3ns ± 0%   -3.32%          (p=0.008 n=5+5)
BM_UValidate/4  [pdf              ]            2.89µs ± 1%             2.85µs ± 0%   -1.22%          (p=0.008 n=5+5)
BM_UIOVec/0     [html             ]             122µs ± 0%              122µs ± 0%     ~             (p=1.000 n=5+5)
BM_UIOVec/1     [urls             ]             1.08ms ± 0%             1.08ms ± 0%     ~             (p=0.095 n=5+5)
BM_UIOVec/2     [jpg              ]            7.51µs ± 4%             7.69µs ± 6%     ~             (p=0.421 n=5+5)
BM_UIOVec/3     [jpg_200          ]              327ns ± 0%              327ns ± 1%     ~             (p=0.730 n=4+5)
BM_UIOVec/4     [pdf              ]            12.0µs ± 1%             12.0µs ± 0%     ~             (p=0.286 n=5+4)
BM_UFlatSink/0  [html             ]            42.3µs ± 0%             42.5µs ± 0%   +0.46%          (p=0.008 n=5+5)
BM_UFlatSink/1  [urls             ]             589µs ± 0%              575µs ± 0%   -2.36%          (p=0.008 n=5+5)
BM_UFlatSink/2  [jpg              ]            7.40µs ± 8%             7.74µs ± 9%     ~             (p=0.310 n=5+5)
BM_UFlatSink/3  [jpg_200          ]              134ns ± 0%              131ns ± 0%   -1.78%          (p=0.008 n=5+5)
BM_UFlatSink/4  [pdf              ]            8.28µs ± 3%             8.35µs ± 6%     ~             (p=0.548 n=5+5)
BM_UFlatSink/5  [html4            ]             222µs ± 0%              222µs ± 0%     ~             (p=0.690 n=5+5)
BM_UFlatSink/6  [txt1             ]             193µs ± 0%              192µs ± 0%     ~             (p=0.222 n=5+5)
BM_UFlatSink/7  [txt2             ]             171µs ± 0%              169µs ± 0%   -0.91%          (p=0.008 n=5+5)
BM_UFlatSink/8  [txt3             ]             512µs ± 0%              510µs ± 0%   -0.28%          (p=0.032 n=5+5)
BM_UFlatSink/9  [txt4             ]             717µs ± 0%              707µs ± 0%   -1.32%          (p=0.008 n=5+5)
BM_UFlatSink/10 [pb               ]            38.7µs ± 0%             39.2µs ± 0%   +1.29%          (p=0.008 n=5+5)
BM_UFlatSink/11 [gaviota          ]             190µs ± 0%              189µs ± 0%   -0.47%          (p=0.008 n=5+5)
BM_UFlatSink/12 [cp               ]            14.3µs ± 0%             14.2µs ± 0%   -0.65%          (p=0.008 n=5+5)
BM_UFlatSink/13 [c                ]            7.36µs ± 1%             7.29µs ± 0%   -0.92%          (p=0.008 n=5+5)
BM_UFlatSink/14 [lsp              ]            2.30µs ± 1%             2.29µs ± 0%     ~             (p=0.841 n=5+5)
BM_UFlatSink/15 [xls              ]             980µs ± 0%              903µs ± 0%   -7.92%          (p=0.008 n=5+5)
BM_UFlatSink/16 [xls_200          ]              217ns ± 0%              215ns ± 0%   -0.94%          (p=0.008 n=5+5)
BM_UFlatSink/17 [bin              ]             278µs ± 0%              273µs ± 0%   -1.56%          (p=0.008 n=5+5)
BM_UFlatSink/18 [bin_200          ]              107ns ± 5%              104ns ± 0%     ~             (p=0.056 n=5+5)
BM_UFlatSink/19 [sum              ]            29.5µs ± 0%             27.9µs ± 0%   -5.32%          (p=0.008 n=5+5)
BM_UFlatSink/20 [man              ]            3.01µs ± 0%             3.00µs ± 1%     ~             (p=0.310 n=5+5)
BM_ZFlat/0      [html (22.31 %)   ]             127µs ± 0%              126µs ± 0%   -0.46%          (p=0.008 n=5+5)
BM_ZFlat/1      [urls (47.78 %)   ]             1.67ms ± 0%             1.67ms ± 0%     ~             (p=0.548 n=5+5)
BM_ZFlat/2      [jpg (99.95 %)    ]            11.5µs ± 3%             11.6µs ± 6%     ~             (p=0.841 n=5+5)
BM_ZFlat/3      [jpg_200 (73.00 %)]              350ns ± 2%              347ns ± 0%     ~             (p=0.905 n=5+4)
BM_ZFlat/4      [pdf (83.30 %)    ]            14.6µs ± 4%             14.6µs ± 1%     ~             (p=0.421 n=5+5)
BM_ZFlat/5      [html4 (22.52 %)  ]             553µs ± 0%              553µs ± 0%     ~             (p=0.690 n=5+5)
BM_ZFlat/6      [txt1 (57.88 %)   ]             540µs ± 0%              540µs ± 0%     ~             (p=1.000 n=5+5)
BM_ZFlat/7      [txt2 (61.91 %)   ]             481µs ± 0%              479µs ± 0%   -0.54%          (p=0.008 n=5+5)
BM_ZFlat/8      [txt3 (54.99 %)   ]             1.44ms ± 0%             1.44ms ± 0%     ~             (p=0.222 n=5+5)
BM_ZFlat/9      [txt4 (66.26 %)   ]             1.97ms ± 0%             1.97ms ± 0%     ~             (p=0.222 n=5+5)
BM_ZFlat/10     [pb (19.68 %)     ]             110µs ± 0%              110µs ± 0%     ~             (p=0.841 n=5+5)
BM_ZFlat/11     [gaviota (37.72 %)]             411µs ± 0%              410µs ± 0%     ~             (p=0.222 n=5+5)
BM_ZFlat/12     [cp (48.12 %)     ]            46.1µs ± 1%             45.8µs ± 0%     ~             (p=0.056 n=5+5)
BM_ZFlat/13     [c (42.47 %)      ]            17.6µs ± 0%             17.6µs ± 1%     ~             (p=0.310 n=5+5)
BM_ZFlat/14     [lsp (48.37 %)    ]            5.46µs ± 1%             5.49µs ± 0%     ~             (p=0.222 n=5+5)
BM_ZFlat/15     [xls (41.23 %)    ]             1.62ms ± 0%             1.61ms ± 0%     ~             (p=0.190 n=4+5)
BM_ZFlat/16     [xls_200 (78.00 %)]              392ns ± 2%              385ns ± 1%     ~             (p=0.200 n=4+4)
BM_ZFlat/17     [bin (18.11 %)    ]             509µs ± 0%              508µs ± 0%   -0.26%          (p=0.008 n=5+5)
BM_ZFlat/18     [bin_200 (7.50 %) ]             90.2ns ±15%             80.8ns ± 0%  -10.39%          (p=0.016 n=5+4)
BM_ZFlat/19     [sum (48.96 %)    ]            81.1µs ± 0%             79.1µs ± 1%   -2.37%          (p=0.008 n=5+5)
BM_ZFlat/20     [man (59.21 %)    ]            7.61µs ± 1%             7.57µs ± 1%     ~             (p=0.421 n=5+5)

name                                          old allocs/op           new allocs/op           delta
BM_UFlat/0      [html             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/1      [urls             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/2      [jpg              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/3      [jpg_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/4      [pdf              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/5      [html4            ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/6      [txt1             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/7      [txt2             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/8      [txt3             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/9      [txt4             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/10     [pb               ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/11     [gaviota          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/12     [cp               ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/13     [c                ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/14     [lsp              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/15     [xls              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/16     [xls_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/17     [bin              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/18     [bin_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/19     [sum              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/20     [man              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UValidate/0  [html             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UValidate/1  [urls             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UValidate/2  [jpg              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UValidate/3  [jpg_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UValidate/4  [pdf              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UIOVec/0     [html             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UIOVec/1     [urls             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UIOVec/2     [jpg              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UIOVec/3     [jpg_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UIOVec/4     [pdf              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/0  [html             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/1  [urls             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/2  [jpg              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/3  [jpg_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/4  [pdf              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/5  [html4            ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/6  [txt1             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/7  [txt2             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/8  [txt3             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/9  [txt4             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/10 [pb               ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/11 [gaviota          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/12 [cp               ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/13 [c                ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/14 [lsp              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/15 [xls              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/16 [xls_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/17 [bin              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/18 [bin_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/19 [sum              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/20 [man              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_ZFlat/0      [html (22.31 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/1      [urls (47.78 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/2      [jpg (99.95 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/3      [jpg_200 (73.00 %)]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/4      [pdf (83.30 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/5      [html4 (22.52 %)  ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/6      [txt1 (57.88 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/7      [txt2 (61.91 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/8      [txt3 (54.99 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/9      [txt4 (66.26 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/10     [pb (19.68 %)     ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/11     [gaviota (37.72 %)]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/12     [cp (48.12 %)     ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/13     [c (42.47 %)      ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/14     [lsp (48.37 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/15     [xls (41.23 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/16     [xls_200 (78.00 %)]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/17     [bin (18.11 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/18     [bin_200 (7.50 %) ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/19     [sum (48.96 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/20     [man (59.21 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)

name                                          old peak-mem(Bytes)/op  new peak-mem(Bytes)/op  delta
BM_UFlat/0      [html             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/1      [urls             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/2      [jpg              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/3      [jpg_200          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/4      [pdf              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/5      [html4            ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/6      [txt1             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/7      [txt2             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/8      [txt3             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/9      [txt4             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/10     [pb               ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/11     [gaviota          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/12     [cp               ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/13     [c                ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/14     [lsp              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/15     [xls              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/16     [xls_200          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/17     [bin              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/18     [bin_200          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/19     [sum              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/20     [man              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UValidate/0  [html             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UValidate/1  [urls             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UValidate/2  [jpg              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UValidate/3  [jpg_200          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UValidate/4  [pdf              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UIOVec/0     [html             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UIOVec/1     [urls             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UIOVec/2     [jpg              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UIOVec/3     [jpg_200          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UIOVec/4     [pdf              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlatSink/0  [html             ]               102k ± 0%               102k ± 0%     ~     (all samples are equal)
BM_UFlatSink/1  [urls             ]               702k ± 0%               702k ± 0%     ~     (all samples are equal)
BM_UFlatSink/2  [jpg              ]               123k ± 0%               123k ± 0%     ~     (all samples are equal)
BM_UFlatSink/3  [jpg_200          ]                201 ± 0%                201 ± 0%     ~     (all samples are equal)
BM_UFlatSink/4  [pdf              ]               102k ± 0%               102k ± 0%     ~     (all samples are equal)
BM_UFlatSink/5  [html4            ]               410k ± 0%               410k ± 0%     ~     (all samples are equal)
BM_UFlatSink/6  [txt1             ]               152k ± 0%               152k ± 0%     ~     (all samples are equal)
BM_UFlatSink/7  [txt2             ]               125k ± 0%               125k ± 0%     ~     (all samples are equal)
BM_UFlatSink/8  [txt3             ]               427k ± 0%               427k ± 0%     ~     (all samples are equal)
BM_UFlatSink/9  [txt4             ]               482k ± 0%               482k ± 0%     ~     (all samples are equal)
BM_UFlatSink/10 [pb               ]               119k ± 0%               119k ± 0%     ~     (all samples are equal)
BM_UFlatSink/11 [gaviota          ]               184k ± 0%               184k ± 0%     ~     (all samples are equal)
BM_UFlatSink/12 [cp               ]              24.6k ± 0%              24.6k ± 0%     ~     (all samples are equal)
BM_UFlatSink/13 [c                ]              11.2k ± 0%              11.2k ± 0%     ~     (all samples are equal)
BM_UFlatSink/14 [lsp              ]              3.72k ± 0%              3.72k ± 0%     ~     (all samples are equal)
BM_UFlatSink/15 [xls              ]              1.03M ± 0%              1.03M ± 0%     ~     (all samples are equal)
BM_UFlatSink/16 [xls_200          ]                201 ± 0%                201 ± 0%     ~     (all samples are equal)
BM_UFlatSink/17 [bin              ]               513k ± 0%               513k ± 0%     ~     (all samples are equal)
BM_UFlatSink/18 [bin_200          ]                201 ± 0%                201 ± 0%     ~     (all samples are equal)
BM_UFlatSink/19 [sum              ]              38.2k ± 0%              38.2k ± 0%     ~     (all samples are equal)
BM_UFlatSink/20 [man              ]              4.23k ± 0%              4.23k ± 0%     ~     (all samples are equal)
BM_ZFlat/0      [html (22.31 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/1      [urls (47.78 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/2      [jpg (99.95 %)    ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/3      [jpg_200 (73.00 %)]              30.7k ± 0%              30.7k ± 0%     ~     (all samples are equal)
BM_ZFlat/4      [pdf (83.30 %)    ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/5      [html4 (22.52 %)  ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/6      [txt1 (57.88 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/7      [txt2 (61.91 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/8      [txt3 (54.99 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/9      [txt4 (66.26 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/10     [pb (19.68 %)     ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/11     [gaviota (37.72 %)]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/12     [cp (48.12 %)     ]              86.1k ± 0%              86.1k ± 0%     ~     (all samples are equal)
BM_ZFlat/13     [c (42.47 %)      ]              57.0k ± 0%              57.0k ± 0%     ~     (all samples are equal)
BM_ZFlat/14     [lsp (48.37 %)    ]              30.6k ± 0%              30.6k ± 0%     ~     (all samples are equal)
BM_ZFlat/15     [xls (41.23 %)    ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/16     [xls_200 (78.00 %)]              30.7k ± 0%              30.7k ± 0%     ~     (all samples are equal)
BM_ZFlat/17     [bin (18.11 %)    ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/18     [bin_200 (7.50 %) ]              30.7k ± 0%              30.7k ± 0%     ~     (all samples are equal)
BM_ZFlat/19     [sum (48.96 %)    ]               116k ± 0%               116k ± 0%     ~     (all samples are equal)
BM_ZFlat/20     [man (59.21 %)    ]              30.6k ± 0%              30.6k ± 0%     ~     (all samples are equal)

name                                          old speed               new speed               delta
BM_UFlat/0      [html             ]           2.43GB/s ± 0%           2.41GB/s ± 0%   -0.59%          (p=0.032 n=5+5)
BM_UFlat/1      [urls             ]           1.19GB/s ± 1%           1.22GB/s ± 0%   +2.58%          (p=0.008 n=5+5)
BM_UFlat/2      [jpg              ]           17.2GB/s ± 1%           17.3GB/s ± 1%     ~             (p=0.421 n=5+5)
BM_UFlat/3      [jpg_200          ]           1.54GB/s ± 1%           1.56GB/s ± 1%   +1.23%          (p=0.008 n=5+5)
BM_UFlat/4      [pdf              ]           12.5GB/s ± 1%           12.5GB/s ± 0%     ~             (p=0.413 n=5+4)
BM_UFlat/5      [html4            ]           1.85GB/s ± 1%           1.85GB/s ± 0%     ~             (p=0.690 n=5+5)
BM_UFlat/6      [txt1             ]            793MB/s ± 0%            794MB/s ± 0%     ~             (p=0.690 n=5+5)
BM_UFlat/7      [txt2             ]            738MB/s ± 0%            742MB/s ± 1%     ~             (p=0.151 n=5+5)
BM_UFlat/8      [txt3             ]            839MB/s ± 0%            838MB/s ± 0%     ~             (p=0.310 n=5+5)
BM_UFlat/9      [txt4             ]            674MB/s ± 0%            684MB/s ± 0%   +1.55%          (p=0.008 n=5+5)
BM_UFlat/10     [pb               ]           3.07GB/s ± 1%           3.03GB/s ± 1%   -1.27%          (p=0.008 n=5+5)
BM_UFlat/11     [gaviota          ]            974MB/s ± 0%            978MB/s ± 0%   +0.50%          (p=0.032 n=5+5)
BM_UFlat/12     [cp               ]           1.72GB/s ± 0%           1.74GB/s ± 1%   +0.79%          (p=0.008 n=5+5)
BM_UFlat/13     [c                ]           1.52GB/s ± 1%           1.53GB/s ± 1%     ~             (p=0.421 n=5+5)
BM_UFlat/14     [lsp              ]           1.62GB/s ± 1%           1.64GB/s ± 0%     ~             (p=0.151 n=5+5)
BM_UFlat/15     [xls              ]           1.05GB/s ± 0%           1.14GB/s ± 1%   +8.60%          (p=0.008 n=5+5)
BM_UFlat/16     [xls_200          ]            942MB/s ± 0%            941MB/s ± 1%     ~             (p=0.690 n=5+5)
BM_UFlat/17     [bin              ]           1.85GB/s ± 0%           1.88GB/s ± 0%   +1.60%          (p=0.008 n=5+5)
BM_UFlat/18     [bin_200          ]           1.99GB/s ± 0%           1.99GB/s ± 0%     ~             (p=0.421 n=5+5)
BM_UFlat/19     [sum              ]           1.30GB/s ± 1%           1.37GB/s ± 1%   +5.28%          (p=0.008 n=5+5)
BM_UFlat/20     [man              ]           1.43GB/s ± 1%           1.42GB/s ± 0%     ~             (p=0.421 n=5+5)
BM_UValidate/0  [html             ]           3.07GB/s ± 0%           3.05GB/s ± 1%     ~             (p=0.222 n=5+5)
BM_UValidate/1  [urls             ]           1.59GB/s ± 0%           1.60GB/s ± 0%     ~             (p=0.310 n=5+5)
BM_UValidate/2  [jpg              ]            845GB/s ± 0%            860GB/s ± 0%   +1.75%          (p=0.008 n=5+5)
BM_UValidate/3  [jpg_200          ]           2.04GB/s ± 1%           2.11GB/s ± 1%   +3.61%          (p=0.008 n=5+5)
BM_UValidate/4  [pdf              ]           35.6GB/s ± 1%           36.1GB/s ± 1%   +1.40%          (p=0.016 n=5+5)
BM_UIOVec/0     [html             ]            845MB/s ± 1%            843MB/s ± 1%     ~             (p=0.310 n=5+5)
BM_UIOVec/1     [urls             ]            653MB/s ± 0%            651MB/s ± 1%     ~             (p=0.190 n=4+5)
BM_UIOVec/2     [jpg              ]           16.4GB/s ± 4%           16.1GB/s ± 5%     ~             (p=0.548 n=5+5)
BM_UIOVec/3     [jpg_200          ]            611MB/s ± 2%            614MB/s ± 0%     ~             (p=0.548 n=5+5)
BM_UIOVec/4     [pdf              ]           8.53GB/s ± 1%           8.52GB/s ± 3%     ~             (p=0.841 n=5+5)
BM_UFlatSink/0  [html             ]           2.43GB/s ± 1%           2.42GB/s ± 0%     ~             (p=0.222 n=5+5)
BM_UFlatSink/1  [urls             ]           1.20GB/s ± 0%           1.23GB/s ± 1%   +2.38%          (p=0.008 n=5+5)
BM_UFlatSink/2  [jpg              ]           16.7GB/s ± 8%           16.0GB/s ± 8%     ~             (p=0.151 n=5+5)
BM_UFlatSink/3  [jpg_200          ]           1.50GB/s ± 0%           1.53GB/s ± 0%   +2.13%          (p=0.008 n=5+5)
BM_UFlatSink/4  [pdf              ]           12.5GB/s ± 0%           12.3GB/s ± 5%     ~             (p=0.730 n=4+5)
BM_UFlatSink/5  [html4            ]           1.85GB/s ± 0%           1.84GB/s ± 0%     ~             (p=0.151 n=5+5)
BM_UFlatSink/6  [txt1             ]            791MB/s ± 0%            791MB/s ± 0%     ~             (p=1.000 n=5+5)
BM_UFlatSink/7  [txt2             ]            735MB/s ± 0%            739MB/s ± 0%   +0.51%          (p=0.016 n=5+4)
BM_UFlatSink/8  [txt3             ]            838MB/s ± 0%            840MB/s ± 0%     ~             (p=0.151 n=5+5)
BM_UFlatSink/9  [txt4             ]            674MB/s ± 0%            683MB/s ± 0%   +1.37%          (p=0.008 n=5+5)
BM_UFlatSink/10 [pb               ]           3.07GB/s ± 0%           3.03GB/s ± 1%   -1.34%          (p=0.008 n=5+5)
BM_UFlatSink/11 [gaviota          ]            973MB/s ± 0%            975MB/s ± 0%     ~             (p=0.310 n=5+5)
BM_UFlatSink/12 [cp               ]           1.73GB/s ± 1%           1.74GB/s ± 1%     ~             (p=0.056 n=5+5)
BM_UFlatSink/13 [c                ]           1.52GB/s ± 1%           1.53GB/s ± 1%   +0.76%          (p=0.032 n=5+5)
BM_UFlatSink/14 [lsp              ]           1.62GB/s ± 0%           1.63GB/s ± 0%     ~             (p=0.548 n=5+5)
BM_UFlatSink/15 [xls              ]           1.05GB/s ± 0%           1.14GB/s ± 0%   +8.57%          (p=0.008 n=5+5)
BM_UFlatSink/16 [xls_200          ]            925MB/s ± 0%            933MB/s ± 0%   +0.85%          (p=0.008 n=5+5)
BM_UFlatSink/17 [bin              ]           1.85GB/s ± 1%           1.88GB/s ± 0%   +1.47%          (p=0.008 n=5+5)
BM_UFlatSink/18 [bin_200          ]           1.88GB/s ± 5%           1.93GB/s ± 0%     ~             (p=0.421 n=5+5)
BM_UFlatSink/19 [sum              ]           1.30GB/s ± 1%           1.37GB/s ± 1%   +5.18%          (p=0.008 n=5+5)
BM_UFlatSink/20 [man              ]           1.41GB/s ± 0%           1.41GB/s ± 1%     ~             (p=0.222 n=5+5)
BM_ZFlat/0      [html (22.31 %)   ]            809MB/s ± 0%            814MB/s ± 1%   +0.61%          (p=0.016 n=5+5)
BM_ZFlat/1      [urls (47.78 %)   ]            423MB/s ± 0%            422MB/s ± 0%     ~             (p=0.548 n=5+5)
BM_ZFlat/2      [jpg (99.95 %)    ]           10.8GB/s ± 3%           10.6GB/s ± 5%     ~             (p=0.690 n=5+5)
BM_ZFlat/3      [jpg_200 (73.00 %)]            575MB/s ± 2%            579MB/s ± 0%     ~             (p=1.000 n=5+4)
BM_ZFlat/4      [pdf (83.30 %)    ]           7.06GB/s ± 4%           7.05GB/s ± 2%     ~             (p=0.421 n=5+5)
BM_ZFlat/5      [html4 (22.52 %)  ]            745MB/s ± 0%            744MB/s ± 0%     ~             (p=0.421 n=5+5)
BM_ZFlat/6      [txt1 (57.88 %)   ]            282MB/s ± 0%            282MB/s ± 1%     ~             (p=1.000 n=5+5)
BM_ZFlat/7      [txt2 (61.91 %)   ]            261MB/s ± 0%            263MB/s ± 0%   +0.55%          (p=0.032 n=5+5)
BM_ZFlat/8      [txt3 (54.99 %)   ]            297MB/s ± 1%            297MB/s ± 0%     ~             (p=1.000 n=5+5)
BM_ZFlat/9      [txt4 (66.26 %)   ]            245MB/s ± 0%            246MB/s ± 0%     ~             (p=0.286 n=5+5)
BM_ZFlat/10     [pb (19.68 %)     ]           1.08GB/s ± 1%           1.08GB/s ± 0%     ~             (p=0.056 n=5+5)
BM_ZFlat/11     [gaviota (37.72 %)]            450MB/s ± 0%            452MB/s ± 0%   +0.55%          (p=0.016 n=5+5)
BM_ZFlat/12     [cp (48.12 %)     ]            537MB/s ± 1%            538MB/s ± 0%     ~             (p=0.421 n=5+5)
BM_ZFlat/13     [c (42.47 %)      ]            637MB/s ± 1%            634MB/s ± 1%     ~             (p=0.222 n=5+5)
BM_ZFlat/14     [lsp (48.37 %)    ]            684MB/s ± 1%            680MB/s ± 0%     ~             (p=0.310 n=5+5)
BM_ZFlat/15     [xls (41.23 %)    ]            641MB/s ± 0%            640MB/s ± 1%     ~             (p=0.310 n=5+5)
BM_ZFlat/16     [xls_200 (78.00 %)]            501MB/s ± 9%            521MB/s ± 1%     ~             (p=0.111 n=5+4)
BM_ZFlat/17     [bin (18.11 %)    ]           1.01GB/s ± 0%           1.02GB/s ± 1%     ~             (p=0.151 n=5+5)
BM_ZFlat/18     [bin_200 (7.50 %) ]           2.24GB/s ±14%           2.48GB/s ± 0%     ~             (p=0.063 n=5+4)
BM_ZFlat/19     [sum (48.96 %)    ]            473MB/s ± 1%            485MB/s ± 1%   +2.47%          (p=0.008 n=5+5)
BM_ZFlat/20     [man (59.21 %)    ]            558MB/s ± 1%            558MB/s ± 1%     ~             (p=1.000 n=5+5)





Assembly difference: https://godbolt.org/z/cvlH9b

name                                          old time/op             new time/op             delta
BM_UFlat/0      [html             ]            42.3µs ± 0%             42.5µs ± 0%   +0.57%          (p=0.008 n=5+5)
BM_UFlat/1      [urls             ]             590µs ± 0%              575µs ± 0%   -2.60%          (p=0.008 n=5+5)
BM_UFlat/2      [jpg              ]            7.16µs ± 1%             7.15µs ± 1%     ~             (p=0.841 n=5+5)
BM_UFlat/3      [jpg_200          ]              131ns ± 0%              129ns ± 0%   -1.41%          (p=0.008 n=5+5)
BM_UFlat/4      [pdf              ]            8.21µs ± 0%             8.22µs ± 1%     ~             (p=0.690 n=5+5)
BM_UFlat/5      [html4            ]             222µs ± 0%              223µs ± 0%     ~             (p=0.841 n=5+5)
BM_UFlat/6      [txt1             ]             193µs ± 0%              192µs ± 0%     ~             (p=0.095 n=5+5)
BM_UFlat/7      [txt2             ]             171µs ± 0%              169µs ± 0%   -0.83%          (p=0.008 n=5+5)
BM_UFlat/8      [txt3             ]             511µs ± 0%              510µs ± 0%     ~             (p=0.841 n=5+5)
BM_UFlat/9      [txt4             ]             717µs ± 0%              707µs ± 0%   -1.42%          (p=0.008 n=5+5)
BM_UFlat/10     [pb               ]            38.8µs ± 0%             39.3µs ± 0%   +1.26%          (p=0.008 n=5+5)
BM_UFlat/11     [gaviota          ]             190µs ± 0%              189µs ± 0%   -0.43%          (p=0.032 n=5+5)
BM_UFlat/12     [cp               ]            14.3µs ± 0%             14.2µs ± 0%   -0.92%          (p=0.008 n=5+5)
BM_UFlat/13     [c                ]            7.35µs ± 1%             7.30µs ± 0%   -0.66%          (p=0.032 n=5+5)
BM_UFlat/14     [lsp              ]            2.30µs ± 1%             2.28µs ± 0%     ~             (p=0.056 n=5+5)
BM_UFlat/15     [xls              ]             983µs ± 0%              904µs ± 0%   -7.99%          (p=0.008 n=5+5)
BM_UFlat/16     [xls_200          ]              213ns ± 0%              213ns ± 1%     ~             (p=0.690 n=5+5)
BM_UFlat/17     [bin              ]             278µs ± 0%              274µs ± 0%   -1.56%          (p=0.008 n=5+5)
BM_UFlat/18     [bin_200          ]              101ns ± 0%              101ns ± 1%     ~             (p=1.000 n=5+5)
BM_UFlat/19     [sum              ]            29.4µs ± 1%             28.0µs ± 1%   -4.98%          (p=0.008 n=5+5)
BM_UFlat/20     [man              ]            2.97µs ± 0%             2.97µs ± 0%     ~             (p=0.421 n=5+5)
BM_UValidate/0  [html             ]            33.6µs ± 0%             33.6µs ± 0%     ~             (p=0.548 n=5+5)
BM_UValidate/1  [urls             ]             443µs ± 0%              441µs ± 0%   -0.43%          (p=0.016 n=4+5)
BM_UValidate/2  [jpg              ]              146ns ± 0%              144ns ± 0%   -1.63%          (p=0.008 n=5+5)
BM_UValidate/3  [jpg_200          ]             98.6ns ± 0%             95.3ns ± 0%   -3.32%          (p=0.008 n=5+5)
BM_UValidate/4  [pdf              ]            2.89µs ± 1%             2.85µs ± 0%   -1.22%          (p=0.008 n=5+5)
BM_UIOVec/0     [html             ]             122µs ± 0%              122µs ± 0%     ~             (p=1.000 n=5+5)
BM_UIOVec/1     [urls             ]             1.08ms ± 0%             1.08ms ± 0%     ~             (p=0.095 n=5+5)
BM_UIOVec/2     [jpg              ]            7.51µs ± 4%             7.69µs ± 6%     ~             (p=0.421 n=5+5)
BM_UIOVec/3     [jpg_200          ]              327ns ± 0%              327ns ± 1%     ~             (p=0.730 n=4+5)
BM_UIOVec/4     [pdf              ]            12.0µs ± 1%             12.0µs ± 0%     ~             (p=0.286 n=5+4)
BM_UFlatSink/0  [html             ]            42.3µs ± 0%             42.5µs ± 0%   +0.46%          (p=0.008 n=5+5)
BM_UFlatSink/1  [urls             ]             589µs ± 0%              575µs ± 0%   -2.36%          (p=0.008 n=5+5)
BM_UFlatSink/2  [jpg              ]            7.40µs ± 8%             7.74µs ± 9%     ~             (p=0.310 n=5+5)
BM_UFlatSink/3  [jpg_200          ]              134ns ± 0%              131ns ± 0%   -1.78%          (p=0.008 n=5+5)
BM_UFlatSink/4  [pdf              ]            8.28µs ± 3%             8.35µs ± 6%     ~             (p=0.548 n=5+5)
BM_UFlatSink/5  [html4            ]             222µs ± 0%              222µs ± 0%     ~             (p=0.690 n=5+5)
BM_UFlatSink/6  [txt1             ]             193µs ± 0%              192µs ± 0%     ~             (p=0.222 n=5+5)
BM_UFlatSink/7  [txt2             ]             171µs ± 0%              169µs ± 0%   -0.91%          (p=0.008 n=5+5)
BM_UFlatSink/8  [txt3             ]             512µs ± 0%              510µs ± 0%   -0.28%          (p=0.032 n=5+5)
BM_UFlatSink/9  [txt4             ]             717µs ± 0%              707µs ± 0%   -1.32%          (p=0.008 n=5+5)
BM_UFlatSink/10 [pb               ]            38.7µs ± 0%             39.2µs ± 0%   +1.29%          (p=0.008 n=5+5)
BM_UFlatSink/11 [gaviota          ]             190µs ± 0%              189µs ± 0%   -0.47%          (p=0.008 n=5+5)
BM_UFlatSink/12 [cp               ]            14.3µs ± 0%             14.2µs ± 0%   -0.65%          (p=0.008 n=5+5)
BM_UFlatSink/13 [c                ]            7.36µs ± 1%             7.29µs ± 0%   -0.92%          (p=0.008 n=5+5)
BM_UFlatSink/14 [lsp              ]            2.30µs ± 1%             2.29µs ± 0%     ~             (p=0.841 n=5+5)
BM_UFlatSink/15 [xls              ]             980µs ± 0%              903µs ± 0%   -7.92%          (p=0.008 n=5+5)
BM_UFlatSink/16 [xls_200          ]              217ns ± 0%              215ns ± 0%   -0.94%          (p=0.008 n=5+5)
BM_UFlatSink/17 [bin              ]             278µs ± 0%              273µs ± 0%   -1.56%          (p=0.008 n=5+5)
BM_UFlatSink/18 [bin_200          ]              107ns ± 5%              104ns ± 0%     ~             (p=0.056 n=5+5)
BM_UFlatSink/19 [sum              ]            29.5µs ± 0%             27.9µs ± 0%   -5.32%          (p=0.008 n=5+5)
BM_UFlatSink/20 [man              ]            3.01µs ± 0%             3.00µs ± 1%     ~             (p=0.310 n=5+5)
BM_ZFlat/0      [html (22.31 %)   ]             127µs ± 0%              126µs ± 0%   -0.46%          (p=0.008 n=5+5)
BM_ZFlat/1      [urls (47.78 %)   ]             1.67ms ± 0%             1.67ms ± 0%     ~             (p=0.548 n=5+5)
BM_ZFlat/2      [jpg (99.95 %)    ]            11.5µs ± 3%             11.6µs ± 6%     ~             (p=0.841 n=5+5)
BM_ZFlat/3      [jpg_200 (73.00 %)]              350ns ± 2%              347ns ± 0%     ~             (p=0.905 n=5+4)
BM_ZFlat/4      [pdf (83.30 %)    ]            14.6µs ± 4%             14.6µs ± 1%     ~             (p=0.421 n=5+5)
BM_ZFlat/5      [html4 (22.52 %)  ]             553µs ± 0%              553µs ± 0%     ~             (p=0.690 n=5+5)
BM_ZFlat/6      [txt1 (57.88 %)   ]             540µs ± 0%              540µs ± 0%     ~             (p=1.000 n=5+5)
BM_ZFlat/7      [txt2 (61.91 %)   ]             481µs ± 0%              479µs ± 0%   -0.54%          (p=0.008 n=5+5)
BM_ZFlat/8      [txt3 (54.99 %)   ]             1.44ms ± 0%             1.44ms ± 0%     ~             (p=0.222 n=5+5)
BM_ZFlat/9      [txt4 (66.26 %)   ]             1.97ms ± 0%             1.97ms ± 0%     ~             (p=0.222 n=5+5)
BM_ZFlat/10     [pb (19.68 %)     ]             110µs ± 0%              110µs ± 0%     ~             (p=0.841 n=5+5)
BM_ZFlat/11     [gaviota (37.72 %)]             411µs ± 0%              410µs ± 0%     ~             (p=0.222 n=5+5)
BM_ZFlat/12     [cp (48.12 %)     ]            46.1µs ± 1%             45.8µs ± 0%     ~             (p=0.056 n=5+5)
BM_ZFlat/13     [c (42.47 %)      ]            17.6µs ± 0%             17.6µs ± 1%     ~             (p=0.310 n=5+5)
BM_ZFlat/14     [lsp (48.37 %)    ]            5.46µs ± 1%             5.49µs ± 0%     ~             (p=0.222 n=5+5)
BM_ZFlat/15     [xls (41.23 %)    ]             1.62ms ± 0%             1.61ms ± 0%     ~             (p=0.190 n=4+5)
BM_ZFlat/16     [xls_200 (78.00 %)]              392ns ± 2%              385ns ± 1%     ~             (p=0.200 n=4+4)
BM_ZFlat/17     [bin (18.11 %)    ]             509µs ± 0%              508µs ± 0%   -0.26%          (p=0.008 n=5+5)
BM_ZFlat/18     [bin_200 (7.50 %) ]             90.2ns ±15%             80.8ns ± 0%  -10.39%          (p=0.016 n=5+4)
BM_ZFlat/19     [sum (48.96 %)    ]            81.1µs ± 0%             79.1µs ± 1%   -2.37%          (p=0.008 n=5+5)
BM_ZFlat/20     [man (59.21 %)    ]            7.61µs ± 1%             7.57µs ± 1%     ~             (p=0.421 n=5+5)

name                                          old allocs/op           new allocs/op           delta
BM_UFlat/0      [html             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/1      [urls             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/2      [jpg              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/3      [jpg_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/4      [pdf              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/5      [html4            ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/6      [txt1             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/7      [txt2             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/8      [txt3             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/9      [txt4             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/10     [pb               ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/11     [gaviota          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/12     [cp               ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/13     [c                ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/14     [lsp              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/15     [xls              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/16     [xls_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/17     [bin              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/18     [bin_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/19     [sum              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlat/20     [man              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UValidate/0  [html             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UValidate/1  [urls             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UValidate/2  [jpg              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UValidate/3  [jpg_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UValidate/4  [pdf              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UIOVec/0     [html             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UIOVec/1     [urls             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UIOVec/2     [jpg              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UIOVec/3     [jpg_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UIOVec/4     [pdf              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/0  [html             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/1  [urls             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/2  [jpg              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/3  [jpg_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/4  [pdf              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/5  [html4            ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/6  [txt1             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/7  [txt2             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/8  [txt3             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/9  [txt4             ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/10 [pb               ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/11 [gaviota          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/12 [cp               ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/13 [c                ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/14 [lsp              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/15 [xls              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/16 [xls_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/17 [bin              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/18 [bin_200          ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/19 [sum              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_UFlatSink/20 [man              ]               0.00 ±NaN%              0.00 ±NaN%     ~     (all samples are equal)
BM_ZFlat/0      [html (22.31 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/1      [urls (47.78 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/2      [jpg (99.95 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/3      [jpg_200 (73.00 %)]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/4      [pdf (83.30 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/5      [html4 (22.52 %)  ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/6      [txt1 (57.88 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/7      [txt2 (61.91 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/8      [txt3 (54.99 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/9      [txt4 (66.26 %)   ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/10     [pb (19.68 %)     ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/11     [gaviota (37.72 %)]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/12     [cp (48.12 %)     ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/13     [c (42.47 %)      ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/14     [lsp (48.37 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/15     [xls (41.23 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/16     [xls_200 (78.00 %)]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/17     [bin (18.11 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/18     [bin_200 (7.50 %) ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/19     [sum (48.96 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)
BM_ZFlat/20     [man (59.21 %)    ]               1.00 ± 0%               1.00 ± 0%     ~     (all samples are equal)

name                                          old peak-mem(Bytes)/op  new peak-mem(Bytes)/op  delta
BM_UFlat/0      [html             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/1      [urls             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/2      [jpg              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/3      [jpg_200          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/4      [pdf              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/5      [html4            ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/6      [txt1             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/7      [txt2             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/8      [txt3             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/9      [txt4             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/10     [pb               ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/11     [gaviota          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/12     [cp               ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/13     [c                ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/14     [lsp              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/15     [xls              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/16     [xls_200          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/17     [bin              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/18     [bin_200          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/19     [sum              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlat/20     [man              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UValidate/0  [html             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UValidate/1  [urls             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UValidate/2  [jpg              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UValidate/3  [jpg_200          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UValidate/4  [pdf              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UIOVec/0     [html             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UIOVec/1     [urls             ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UIOVec/2     [jpg              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UIOVec/3     [jpg_200          ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UIOVec/4     [pdf              ]               4.00 ± 0%               4.00 ± 0%     ~     (all samples are equal)
BM_UFlatSink/0  [html             ]               102k ± 0%               102k ± 0%     ~     (all samples are equal)
BM_UFlatSink/1  [urls             ]               702k ± 0%               702k ± 0%     ~     (all samples are equal)
BM_UFlatSink/2  [jpg              ]               123k ± 0%               123k ± 0%     ~     (all samples are equal)
BM_UFlatSink/3  [jpg_200          ]                201 ± 0%                201 ± 0%     ~     (all samples are equal)
BM_UFlatSink/4  [pdf              ]               102k ± 0%               102k ± 0%     ~     (all samples are equal)
BM_UFlatSink/5  [html4            ]               410k ± 0%               410k ± 0%     ~     (all samples are equal)
BM_UFlatSink/6  [txt1             ]               152k ± 0%               152k ± 0%     ~     (all samples are equal)
BM_UFlatSink/7  [txt2             ]               125k ± 0%               125k ± 0%     ~     (all samples are equal)
BM_UFlatSink/8  [txt3             ]               427k ± 0%               427k ± 0%     ~     (all samples are equal)
BM_UFlatSink/9  [txt4             ]               482k ± 0%               482k ± 0%     ~     (all samples are equal)
BM_UFlatSink/10 [pb               ]               119k ± 0%               119k ± 0%     ~     (all samples are equal)
BM_UFlatSink/11 [gaviota          ]               184k ± 0%               184k ± 0%     ~     (all samples are equal)
BM_UFlatSink/12 [cp               ]              24.6k ± 0%              24.6k ± 0%     ~     (all samples are equal)
BM_UFlatSink/13 [c                ]              11.2k ± 0%              11.2k ± 0%     ~     (all samples are equal)
BM_UFlatSink/14 [lsp              ]              3.72k ± 0%              3.72k ± 0%     ~     (all samples are equal)
BM_UFlatSink/15 [xls              ]              1.03M ± 0%              1.03M ± 0%     ~     (all samples are equal)
BM_UFlatSink/16 [xls_200          ]                201 ± 0%                201 ± 0%     ~     (all samples are equal)
BM_UFlatSink/17 [bin              ]               513k ± 0%               513k ± 0%     ~     (all samples are equal)
BM_UFlatSink/18 [bin_200          ]                201 ± 0%                201 ± 0%     ~     (all samples are equal)
BM_UFlatSink/19 [sum              ]              38.2k ± 0%              38.2k ± 0%     ~     (all samples are equal)
BM_UFlatSink/20 [man              ]              4.23k ± 0%              4.23k ± 0%     ~     (all samples are equal)
BM_ZFlat/0      [html (22.31 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/1      [urls (47.78 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/2      [jpg (99.95 %)    ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/3      [jpg_200 (73.00 %)]              30.7k ± 0%              30.7k ± 0%     ~     (all samples are equal)
BM_ZFlat/4      [pdf (83.30 %)    ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/5      [html4 (22.52 %)  ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/6      [txt1 (57.88 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/7      [txt2 (61.91 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/8      [txt3 (54.99 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/9      [txt4 (66.26 %)   ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/10     [pb (19.68 %)     ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/11     [gaviota (37.72 %)]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/12     [cp (48.12 %)     ]              86.1k ± 0%              86.1k ± 0%     ~     (all samples are equal)
BM_ZFlat/13     [c (42.47 %)      ]              57.0k ± 0%              57.0k ± 0%     ~     (all samples are equal)
BM_ZFlat/14     [lsp (48.37 %)    ]              30.6k ± 0%              30.6k ± 0%     ~     (all samples are equal)
BM_ZFlat/15     [xls (41.23 %)    ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/16     [xls_200 (78.00 %)]              30.7k ± 0%              30.7k ± 0%     ~     (all samples are equal)
BM_ZFlat/17     [bin (18.11 %)    ]               175k ± 0%               175k ± 0%     ~     (all samples are equal)
BM_ZFlat/18     [bin_200 (7.50 %) ]              30.7k ± 0%              30.7k ± 0%     ~     (all samples are equal)
BM_ZFlat/19     [sum (48.96 %)    ]               116k ± 0%               116k ± 0%     ~     (all samples are equal)
BM_ZFlat/20     [man (59.21 %)    ]              30.6k ± 0%              30.6k ± 0%     ~     (all samples are equal)

name                                          old speed               new speed               delta
BM_UFlat/0      [html             ]           2.43GB/s ± 0%           2.41GB/s ± 0%   -0.59%          (p=0.032 n=5+5)
BM_UFlat/1      [urls             ]           1.19GB/s ± 1%           1.22GB/s ± 0%   +2.58%          (p=0.008 n=5+5)
BM_UFlat/2      [jpg              ]           17.2GB/s ± 1%           17.3GB/s ± 1%     ~             (p=0.421 n=5+5)
BM_UFlat/3      [jpg_200          ]           1.54GB/s ± 1%           1.56GB/s ± 1%   +1.23%          (p=0.008 n=5+5)
BM_UFlat/4      [pdf              ]           12.5GB/s ± 1%           12.5GB/s ± 0%     ~             (p=0.413 n=5+4)
BM_UFlat/5      [html4            ]           1.85GB/s ± 1%           1.85GB/s ± 0%     ~             (p=0.690 n=5+5)
BM_UFlat/6      [txt1             ]            793MB/s ± 0%            794MB/s ± 0%     ~             (p=0.690 n=5+5)
BM_UFlat/7      [txt2             ]            738MB/s ± 0%            742MB/s ± 1%     ~             (p=0.151 n=5+5)
BM_UFlat/8      [txt3             ]            839MB/s ± 0%            838MB/s ± 0%     ~             (p=0.310 n=5+5)
BM_UFlat/9      [txt4             ]            674MB/s ± 0%            684MB/s ± 0%   +1.55%          (p=0.008 n=5+5)
BM_UFlat/10     [pb               ]           3.07GB/s ± 1%           3.03GB/s ± 1%   -1.27%          (p=0.008 n=5+5)
BM_UFlat/11     [gaviota          ]            974MB/s ± 0%            978MB/s ± 0%   +0.50%          (p=0.032 n=5+5)
BM_UFlat/12     [cp               ]           1.72GB/s ± 0%           1.74GB/s ± 1%   +0.79%          (p=0.008 n=5+5)
BM_UFlat/13     [c                ]           1.52GB/s ± 1%           1.53GB/s ± 1%     ~             (p=0.421 n=5+5)
BM_UFlat/14     [lsp              ]           1.62GB/s ± 1%           1.64GB/s ± 0%     ~             (p=0.151 n=5+5)
BM_UFlat/15     [xls              ]           1.05GB/s ± 0%           1.14GB/s ± 1%   +8.60%          (p=0.008 n=5+5)
BM_UFlat/16     [xls_200          ]            942MB/s ± 0%            941MB/s ± 1%     ~             (p=0.690 n=5+5)
BM_UFlat/17     [bin              ]           1.85GB/s ± 0%           1.88GB/s ± 0%   +1.60%          (p=0.008 n=5+5)
BM_UFlat/18     [bin_200          ]           1.99GB/s ± 0%           1.99GB/s ± 0%     ~             (p=0.421 n=5+5)
BM_UFlat/19     [sum              ]           1.30GB/s ± 1%           1.37GB/s ± 1%   +5.28%          (p=0.008 n=5+5)
BM_UFlat/20     [man              ]           1.43GB/s ± 1%           1.42GB/s ± 0%     ~             (p=0.421 n=5+5)
BM_UValidate/0  [html             ]           3.07GB/s ± 0%           3.05GB/s ± 1%     ~             (p=0.222 n=5+5)
BM_UValidate/1  [urls             ]           1.59GB/s ± 0%           1.60GB/s ± 0%     ~             (p=0.310 n=5+5)
BM_UValidate/2  [jpg              ]            845GB/s ± 0%            860GB/s ± 0%   +1.75%          (p=0.008 n=5+5)
BM_UValidate/3  [jpg_200          ]           2.04GB/s ± 1%           2.11GB/s ± 1%   +3.61%          (p=0.008 n=5+5)
BM_UValidate/4  [pdf              ]           35.6GB/s ± 1%           36.1GB/s ± 1%   +1.40%          (p=0.016 n=5+5)
BM_UIOVec/0     [html             ]            845MB/s ± 1%            843MB/s ± 1%     ~             (p=0.310 n=5+5)
BM_UIOVec/1     [urls             ]            653MB/s ± 0%            651MB/s ± 1%     ~             (p=0.190 n=4+5)
BM_UIOVec/2     [jpg              ]           16.4GB/s ± 4%           16.1GB/s ± 5%     ~             (p=0.548 n=5+5)
BM_UIOVec/3     [jpg_200          ]            611MB/s ± 2%            614MB/s ± 0%     ~             (p=0.548 n=5+5)
BM_UIOVec/4     [pdf              ]           8.53GB/s ± 1%           8.52GB/s ± 3%     ~             (p=0.841 n=5+5)
BM_UFlatSink/0  [html             ]           2.43GB/s ± 1%           2.42GB/s ± 0%     ~             (p=0.222 n=5+5)
BM_UFlatSink/1  [urls             ]           1.20GB/s ± 0%           1.23GB/s ± 1%   +2.38%          (p=0.008 n=5+5)
BM_UFlatSink/2  [jpg              ]           16.7GB/s ± 8%           16.0GB/s ± 8%     ~             (p=0.151 n=5+5)
BM_UFlatSink/3  [jpg_200          ]           1.50GB/s ± 0%           1.53GB/s ± 0%   +2.13%          (p=0.008 n=5+5)
BM_UFlatSink/4  [pdf              ]           12.5GB/s ± 0%           12.3GB/s ± 5%     ~             (p=0.730 n=4+5)
BM_UFlatSink/5  [html4            ]           1.85GB/s ± 0%           1.84GB/s ± 0%     ~             (p=0.151 n=5+5)
BM_UFlatSink/6  [txt1             ]            791MB/s ± 0%            791MB/s ± 0%     ~             (p=1.000 n=5+5)
BM_UFlatSink/7  [txt2             ]            735MB/s ± 0%            739MB/s ± 0%   +0.51%          (p=0.016 n=5+4)
BM_UFlatSink/8  [txt3             ]            838MB/s ± 0%            840MB/s ± 0%     ~             (p=0.151 n=5+5)
BM_UFlatSink/9  [txt4             ]            674MB/s ± 0%            683MB/s ± 0%   +1.37%          (p=0.008 n=5+5)
BM_UFlatSink/10 [pb               ]           3.07GB/s ± 0%           3.03GB/s ± 1%   -1.34%          (p=0.008 n=5+5)
BM_UFlatSink/11 [gaviota          ]            973MB/s ± 0%            975MB/s ± 0%     ~             (p=0.310 n=5+5)
BM_UFlatSink/12 [cp               ]           1.73GB/s ± 1%           1.74GB/s ± 1%     ~             (p=0.056 n=5+5)
BM_UFlatSink/13 [c                ]           1.52GB/s ± 1%           1.53GB/s ± 1%   +0.76%          (p=0.032 n=5+5)
BM_UFlatSink/14 [lsp              ]           1.62GB/s ± 0%           1.63GB/s ± 0%     ~             (p=0.548 n=5+5)
BM_UFlatSink/15 [xls              ]           1.05GB/s ± 0%           1.14GB/s ± 0%   +8.57%          (p=0.008 n=5+5)
BM_UFlatSink/16 [xls_200          ]            925MB/s ± 0%            933MB/s ± 0%   +0.85%          (p=0.008 n=5+5)
BM_UFlatSink/17 [bin              ]           1.85GB/s ± 1%           1.88GB/s ± 0%   +1.47%          (p=0.008 n=5+5)
BM_UFlatSink/18 [bin_200          ]           1.88GB/s ± 5%           1.93GB/s ± 0%     ~             (p=0.421 n=5+5)
BM_UFlatSink/19 [sum              ]           1.30GB/s ± 1%           1.37GB/s ± 1%   +5.18%          (p=0.008 n=5+5)
BM_UFlatSink/20 [man              ]           1.41GB/s ± 0%           1.41GB/s ± 1%     ~             (p=0.222 n=5+5)
BM_ZFlat/0      [html (22.31 %)   ]            809MB/s ± 0%            814MB/s ± 1%   +0.61%          (p=0.016 n=5+5)
BM_ZFlat/1      [urls (47.78 %)   ]            423MB/s ± 0%            422MB/s ± 0%     ~             (p=0.548 n=5+5)
BM_ZFlat/2      [jpg (99.95 %)    ]           10.8GB/s ± 3%           10.6GB/s ± 5%     ~             (p=0.690 n=5+5)
BM_ZFlat/3      [jpg_200 (73.00 %)]            575MB/s ± 2%            579MB/s ± 0%     ~             (p=1.000 n=5+4)
BM_ZFlat/4      [pdf (83.30 %)    ]           7.06GB/s ± 4%           7.05GB/s ± 2%     ~             (p=0.421 n=5+5)
BM_ZFlat/5      [html4 (22.52 %)  ]            745MB/s ± 0%            744MB/s ± 0%     ~             (p=0.421 n=5+5)
BM_ZFlat/6      [txt1 (57.88 %)   ]            282MB/s ± 0%            282MB/s ± 1%     ~             (p=1.000 n=5+5)
BM_ZFlat/7      [txt2 (61.91 %)   ]            261MB/s ± 0%            263MB/s ± 0%   +0.55%          (p=0.032 n=5+5)
BM_ZFlat/8      [txt3 (54.99 %)   ]            297MB/s ± 1%            297MB/s ± 0%     ~             (p=1.000 n=5+5)
BM_ZFlat/9      [txt4 (66.26 %)   ]            245MB/s ± 0%            246MB/s ± 0%     ~             (p=0.286 n=5+5)
BM_ZFlat/10     [pb (19.68 %)     ]           1.08GB/s ± 1%           1.08GB/s ± 0%     ~             (p=0.056 n=5+5)
BM_ZFlat/11     [gaviota (37.72 %)]            450MB/s ± 0%            452MB/s ± 0%   +0.55%          (p=0.016 n=5+5)
BM_ZFlat/12     [cp (48.12 %)     ]            537MB/s ± 1%            538MB/s ± 0%     ~             (p=0.421 n=5+5)
BM_ZFlat/13     [c (42.47 %)      ]            637MB/s ± 1%            634MB/s ± 1%     ~             (p=0.222 n=5+5)
BM_ZFlat/14     [lsp (48.37 %)    ]            684MB/s ± 1%            680MB/s ± 0%     ~             (p=0.310 n=5+5)
BM_ZFlat/15     [xls (41.23 %)    ]            641MB/s ± 0%            640MB/s ± 1%     ~             (p=0.310 n=5+5)
BM_ZFlat/16     [xls_200 (78.00 %)]            501MB/s ± 9%            521MB/s ± 1%     ~             (p=0.111 n=5+4)
BM_ZFlat/17     [bin (18.11 %)    ]           1.01GB/s ± 0%           1.02GB/s ± 1%     ~             (p=0.151 n=5+5)
BM_ZFlat/18     [bin_200 (7.50 %) ]           2.24GB/s ±14%           2.48GB/s ± 0%     ~             (p=0.063 n=5+4)
BM_ZFlat/19     [sum (48.96 %)    ]            473MB/s ± 1%            485MB/s ± 1%   +2.47%          (p=0.008 n=5+5)
BM_ZFlat/20     [man (59.21 %)    ]            558MB/s ± 1%            558MB/s ± 1%     ~             (p=1.000 n=5+5)







Fix typo in two argument names in stubs.
2019-01-06T21:49:33+00:00

costan
costan@google.com

2019-01-06T21:06:38+00:00

fdba21ffd6ea490401fd37f4230db37222cbc57a

The stubs are only used in the open source version, so it wasn't caught
in internal tests.





The stubs are only used in the open source version, so it wasn't caught
in internal tests.







Remove direct use of _builtin_clz.
2019-01-06T20:49:08+00:00

costan
costan@google.com

2019-01-06T19:48:31+00:00

81d444e4e4a146fdc503ff335ddb5cf0238cce4f

A previous CL introduced _builtin_clz in zippy.cc. This is a GCC / Clang
intrinsic, and is not supported in Visual Studio. The rest of the
project uses bit manipulation intrinsics via the functions in Bits::,
which are stubbed out for the open source build in
zippy-stubs-internal.h.

This CL extracts Bits::Log2FloorNonZero() out of Bits::Log2Floor() in
the stubbed version of Bits, adds assertions to the Bits::*NonZero()
functions in the stubs, and converts _builtin_clz to a
Bits::Log2FloorNonZero() call.

The latter part is not obvious. A mathematical proof of correctness is
outlined in added comments. An empirical proof is available at
https://godbolt.org/z/mPKWmh -- CalculateTableSizeOld(), which is the
current code, compiles to the same assembly on Clang as
CalculateTableSizeNew1(), which is the bigger jump in the proof.
CalculateTableSizeNew2() is a fairly obvious transformation from
CalculateTableSizeNew1(), and results in slightly better assembly on all
supported compilers.

Two benchmark runs with the same arguments as the original CL only
showed differences in completely disjoint tests, suggesting that the
differences are pure noise.





A previous CL introduced _builtin_clz in zippy.cc. This is a GCC / Clang
intrinsic, and is not supported in Visual Studio. The rest of the
project uses bit manipulation intrinsics via the functions in Bits::,
which are stubbed out for the open source build in
zippy-stubs-internal.h.

This CL extracts Bits::Log2FloorNonZero() out of Bits::Log2Floor() in
the stubbed version of Bits, adds assertions to the Bits::*NonZero()
functions in the stubs, and converts _builtin_clz to a
Bits::Log2FloorNonZero() call.

The latter part is not obvious. A mathematical proof of correctness is
outlined in added comments. An empirical proof is available at
https://godbolt.org/z/mPKWmh -- CalculateTableSizeOld(), which is the
current code, compiles to the same assembly on Clang as
CalculateTableSizeNew1(), which is the bigger jump in the proof.
CalculateTableSizeNew2() is a fairly obvious transformation from
CalculateTableSizeNew1(), and results in slightly better assembly on all
supported compilers.

Two benchmark runs with the same arguments as the original CL only
showed differences in completely disjoint tests, suggesting that the
differences are pure noise.







Remove use of std::uniform_distribution<uint8_t>.
2019-01-06T20:48:39+00:00

costan
costan@google.com

2019-01-06T19:47:58+00:00

9a6fa91217afd12b75311e07750b6d4920870ed3

A previous CL removed use of Google-specific random number generating
functionality, such as ACMRandom, and used the C++11 standard library
instead. The CL used std::uniform_distribution<uint8_t> to generate
random bytes, which seems to be unsupported by the standard [1, 2].

For better or for worse, our toolchain does not complain. However,
Visual Studio errors out with "invalid template argument for
uniform_int_distribution: N4659 29.6.1.1 [rand.req.genl]/1e requires one
of short, int, long, long long, unsigned short, unsigned int, unsigned
long, or unsigned long long".

This CL replaces std::uniform_distribution<uint8_t> with
std::uniform_distribution<int>(0, 255) and appropriate static_cast<>s.

[1] http://eel.is/c++draft/rand.req.genl#1.6
[2] https://github.com/cplusplus/draft/blob/be83c0b472b3912df2ba63bb2831f2a7798badd3/source/numerics.tex#L1807-L1817





A previous CL removed use of Google-specific random number generating
functionality, such as ACMRandom, and used the C++11 standard library
instead. The CL used std::uniform_distribution<uint8_t> to generate
random bytes, which seems to be unsupported by the standard [1, 2].

For better or for worse, our toolchain does not complain. However,
Visual Studio errors out with "invalid template argument for
uniform_int_distribution: N4659 29.6.1.1 [rand.req.genl]/1e requires one
of short, int, long, long long, unsigned short, unsigned int, unsigned
long, or unsigned long long".

This CL replaces std::uniform_distribution<uint8_t> with
std::uniform_distribution<int>(0, 255) and appropriate static_cast<>s.

[1] http://eel.is/c++draft/rand.req.genl#1.6
[2] https://github.com/cplusplus/draft/blob/be83c0b472b3912df2ba63bb2831f2a7798badd3/source/numerics.tex#L1807-L1817







Use std random number generators in tests.
2019-01-05T03:09:39+00:00

costan
costan@google.com

2019-01-04T22:35:15+00:00

3fcbc47f9976c880d1e915b1c7cf17633e70e772

An earlier CL introduced absl::Uniform, which is not yet open sourced,
and therefore unavailable in the open source build.

This CL removes absl::Uniform and ACMRandom in favor of equivalent C++11
standard random generators. Abseil promises to be faster than the
standard library, but we can afford a speed hit in tests in return for
an easier open sourcing story.





An earlier CL introduced absl::Uniform, which is not yet open sourced,
and therefore unavailable in the open source build.

This CL removes absl::Uniform and ACMRandom in favor of equivalent C++11
standard random generators. Abseil promises to be faster than the
standard library, but we can afford a speed hit in tests in return for
an easier open sourcing story.







Convert DCHECK to assert.
2019-01-05T03:09:15+00:00

costan
costan@google.com

2019-01-04T04:39:15+00:00

925c3094c4a7daaf85975a9737e89036b433c444

The open source build does not support DCHECK, and this project uses
assert() instead of DCHECK.





The open source build does not support DCHECK, and this project uses
assert() instead of DCHECK.







Update Travis CI configuration.
2019-01-05T03:09:07+00:00

costan
costan@google.com

2019-01-03T01:51:12+00:00

02de4ff1d16612c3a0168d9cd1d45186a805835e

The Travis CI configuration updates reflect the following changes:
* Container-based builds (sudo: false) have been removed.
  https://changelog.travis-ci.com/the-container-based-build-environment-is-fully-deprecated-84517
* Ubuntu Xenial (16.04) is available as a base image.
  https://blog.travis-ci.com/2018-11-08-xenial-release
* Homebrew now has a dedicated DSL.
  https://docs.travis-ci.com/user/installing-dependencies/#installing-packages-on-os-x

To take full advantage of VM resources, CI builds now use Ninja
https://ninja-build.org/ instead of Make.





The Travis CI configuration updates reflect the following changes:
* Container-based builds (sudo: false) have been removed.
  https://changelog.travis-ci.com/the-container-based-build-environment-is-fully-deprecated-84517
* Ubuntu Xenial (16.04) is available as a base image.
  https://blog.travis-ci.com/2018-11-08-xenial-release
* Homebrew now has a dedicated DSL.
  https://docs.travis-ci.com/user/installing-dependencies/#installing-packages-on-os-x

To take full advantage of VM resources, CI builds now use Ninja
https://ninja-build.org/ instead of Make.







Add comment explaining MSan false-positive workaround
2019-01-05T03:09:01+00:00

atdt
atdt@google.com

2018-12-15T09:23:22+00:00

f7aece15e2130154181e96875fbe86f1b59b526d