| Commit message (Collapse) | Author | Age | Files | Lines |
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whether there's 16 bytes free and then checking right afterwards
(when having subtracted the literal size) that there are now
5 bytes free, just check once for 21 bytes. This skips a compare
and a branch; although it is easily predictable, it is still
a few cycles on a fast path that we would like to get rid of.
Benchmarking this yields very confusing results. On open-source
GCC 4.8.1 on Haswell, we get exactly the expected results; the
benchmarks where we hit the fast path for literals (in particular
the two HTML benchmarks and the protobuf benchmark) give very nice
speedups, and the others are not really affected.
However, benchmarks with Google's GCC branch on other hardware
is much less clear. It seems that we have a weak loss in some cases
(and the win for the “typical” win cases are not nearly as clear),
but that it depends on microarchitecture and plain luck in how we run
the benchmark. Looking at the generated assembler, it seems that
the removal of the if causes other large-scale changes in how the
function is laid out, which makes it likely that this is just bad luck.
Thus, we should keep this change, even though its exact current impact is
unclear; it's a sensible change per se, and dropping it on the basis of
microoptimization for a given compiler (or even branch of a compiler)
would seem like a bad strategy in the long run.
Microbenchmark results (all in 64-bit, opt mode):
Nehalem, Google GCC:
Benchmark Base (ns) New (ns) Improvement
------------------------------------------------------------------------------
BM_UFlat/0 76747 75591 1.3GB/s html +1.5%
BM_UFlat/1 765756 757040 886.3MB/s urls +1.2%
BM_UFlat/2 10867 10893 10.9GB/s jpg -0.2%
BM_UFlat/3 124 131 1.4GB/s jpg_200 -5.3%
BM_UFlat/4 31663 31596 2.8GB/s pdf +0.2%
BM_UFlat/5 314162 308176 1.2GB/s html4 +1.9%
BM_UFlat/6 29668 29746 790.6MB/s cp -0.3%
BM_UFlat/7 12958 13386 796.4MB/s c -3.2%
BM_UFlat/8 3596 3682 966.0MB/s lsp -2.3%
BM_UFlat/9 1019193 1033493 953.3MB/s xls -1.4%
BM_UFlat/10 239 247 775.3MB/s xls_200 -3.2%
BM_UFlat/11 236411 240271 606.9MB/s txt1 -1.6%
BM_UFlat/12 206639 209768 571.2MB/s txt2 -1.5%
BM_UFlat/13 627803 635722 641.4MB/s txt3 -1.2%
BM_UFlat/14 845932 857816 538.2MB/s txt4 -1.4%
BM_UFlat/15 402107 391670 1.2GB/s bin +2.7%
BM_UFlat/16 283 279 683.6MB/s bin_200 +1.4%
BM_UFlat/17 46070 46815 781.5MB/s sum -1.6%
BM_UFlat/18 5053 5163 782.0MB/s man -2.1%
BM_UFlat/19 79721 76581 1.4GB/s pb +4.1%
BM_UFlat/20 251158 252330 697.5MB/s gaviota -0.5%
Sum of all benchmarks 4966150 4980396 -0.3%
Sandy Bridge, Google GCC:
Benchmark Base (ns) New (ns) Improvement
------------------------------------------------------------------------------
BM_UFlat/0 42850 42182 2.3GB/s html +1.6%
BM_UFlat/1 525660 515816 1.3GB/s urls +1.9%
BM_UFlat/2 7173 7283 16.3GB/s jpg -1.5%
BM_UFlat/3 92 91 2.1GB/s jpg_200 +1.1%
BM_UFlat/4 15147 14872 5.9GB/s pdf +1.8%
BM_UFlat/5 199936 192116 2.0GB/s html4 +4.1%
BM_UFlat/6 12796 12443 1.8GB/s cp +2.8%
BM_UFlat/7 6588 6400 1.6GB/s c +2.9%
BM_UFlat/8 2010 1951 1.8GB/s lsp +3.0%
BM_UFlat/9 761124 763049 1.3GB/s xls -0.3%
BM_UFlat/10 186 189 1016.1MB/s xls_200 -1.6%
BM_UFlat/11 159354 158460 918.6MB/s txt1 +0.6%
BM_UFlat/12 139732 139950 856.1MB/s txt2 -0.2%
BM_UFlat/13 429917 425027 961.7MB/s txt3 +1.2%
BM_UFlat/14 585255 587324 785.8MB/s txt4 -0.4%
BM_UFlat/15 276186 266173 1.8GB/s bin +3.8%
BM_UFlat/16 205 207 925.5MB/s bin_200 -1.0%
BM_UFlat/17 24925 24935 1.4GB/s sum -0.0%
BM_UFlat/18 2632 2576 1.5GB/s man +2.2%
BM_UFlat/19 40546 39108 2.8GB/s pb +3.7%
BM_UFlat/20 175803 168209 1048.9MB/s gaviota +4.5%
Sum of all benchmarks 3408117 3368361 +1.2%
Haswell, upstream GCC 4.8.1:
Benchmark Base (ns) New (ns) Improvement
------------------------------------------------------------------------------
BM_UFlat/0 46308 40641 2.3GB/s html +13.9%
BM_UFlat/1 513385 514706 1.3GB/s urls -0.3%
BM_UFlat/2 6197 6151 19.2GB/s jpg +0.7%
BM_UFlat/3 61 61 3.0GB/s jpg_200 +0.0%
BM_UFlat/4 13551 13429 6.5GB/s pdf +0.9%
BM_UFlat/5 198317 190243 2.0GB/s html4 +4.2%
BM_UFlat/6 14768 12560 1.8GB/s cp +17.6%
BM_UFlat/7 6453 6447 1.6GB/s c +0.1%
BM_UFlat/8 1991 1980 1.8GB/s lsp +0.6%
BM_UFlat/9 766947 770424 1.2GB/s xls -0.5%
BM_UFlat/10 170 169 1.1GB/s xls_200 +0.6%
BM_UFlat/11 164350 163554 888.7MB/s txt1 +0.5%
BM_UFlat/12 145444 143830 832.1MB/s txt2 +1.1%
BM_UFlat/13 437849 438413 929.2MB/s txt3 -0.1%
BM_UFlat/14 603587 605309 759.8MB/s txt4 -0.3%
BM_UFlat/15 249799 248067 1.9GB/s bin +0.7%
BM_UFlat/16 191 188 1011.4MB/s bin_200 +1.6%
BM_UFlat/17 26064 24778 1.4GB/s sum +5.2%
BM_UFlat/18 2620 2601 1.5GB/s man +0.7%
BM_UFlat/19 44551 37373 3.0GB/s pb +19.2%
BM_UFlat/20 165408 164584 1.0GB/s gaviota +0.5%
Sum of all benchmarks 3408011 3385508 +0.7%
git-svn-id: http://snappy.googlecode.com/svn/trunk@78 03e5f5b5-db94-4691-08a0-1a8bf15f6143
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Windows does not have struct iovec defined anywhere,
so we define our own version that's equal to what UNIX
typically has.
The bulk of this patch was contributed by Mohit Aron.
R=jeff
git-svn-id: http://snappy.googlecode.com/svn/trunk@76 03e5f5b5-db94-4691-08a0-1a8bf15f6143
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while being effectively performance neutral.
The longer story about density is that we win 3-6% density on the benchmarks
where this has any effect at all; many of the benchmarks (cp, c, lsp, man)
are smaller than 32 kB and thus will have no effect. Binary data also seems
to win little or nothing; of course, the already-compressed data wins nothing.
The protobuf benchmark wins as much as ~18% depending on architecture,
but I wouldn't be too sure that this is representative of protobuf data in
general.
As of performance, we lose a tiny amount since we get more tags (e.g., a long
literal might be broken up into literal-copy-literal), but we win it back with
less clearing of the hash table, and more opportunities to skip incompressible
data (e.g. in the jpg benchmark). Decompression seems to get ever so slightly
slower, again due to more tags. The total net change is about as close to zero
as we can get, so the end effect seems to be simply more density and no
real performance change.
The comment about not changing kBlockSize, scary as it is, is not really
relevant, since we're never going to have a block-level decompressor without
explicitly marked blocks. Replace it with something more appropriate.
This affects the framing format, but it's okay to change it since it basically
has no users yet.
Density (note that cp, c, lsp and man are all smaller than 32 kB):
Benchmark Description Base (%) New (%) Improvement
--------------------------------------------------------------
ZFlat/0 html 22.57 22.31 +5.6%
ZFlat/1 urls 50.89 47.77 +6.5%
ZFlat/2 jpg 99.88 99.87 +0.0%
ZFlat/3 pdf 82.13 82.07 +0.1%
ZFlat/4 html4 23.55 22.51 +4.6%
ZFlat/5 cp 48.12 48.12 +0.0%
ZFlat/6 c 42.40 42.40 +0.0%
ZFlat/7 lsp 48.37 48.37 +0.0%
ZFlat/8 xls 41.34 41.23 +0.3%
ZFlat/9 txt1 59.81 57.87 +3.4%
ZFlat/10 txt2 64.07 61.93 +3.5%
ZFlat/11 txt3 57.11 54.92 +4.0%
ZFlat/12 txt4 68.35 66.22 +3.2%
ZFlat/13 bin 18.21 18.11 +0.6%
ZFlat/14 sum 51.88 48.96 +6.0%
ZFlat/15 man 59.36 59.36 +0.0%
ZFlat/16 pb 23.15 19.64 +17.9%
ZFlat/17 gaviota 38.27 37.72 +1.5%
Geometric mean 45.51 44.15 +3.1%
Microbenchmarks (64-bit, opt):
Westmere 2.8 GHz:
Benchmark Base (ns) New (ns) Improvement
-------------------------------------------------------------------------------------------------
BM_UFlat/0 75342 75027 1.3GB/s html +0.4%
BM_UFlat/1 723767 744269 899.6MB/s urls -2.8%
BM_UFlat/2 10072 10072 11.7GB/s jpg +0.0%
BM_UFlat/3 30747 30388 2.9GB/s pdf +1.2%
BM_UFlat/4 307353 306063 1.2GB/s html4 +0.4%
BM_UFlat/5 28593 28743 816.3MB/s cp -0.5%
BM_UFlat/6 12958 12998 818.1MB/s c -0.3%
BM_UFlat/7 3700 3792 935.8MB/s lsp -2.4%
BM_UFlat/8 999685 999905 982.1MB/s xls -0.0%
BM_UFlat/9 232954 230079 630.4MB/s txt1 +1.2%
BM_UFlat/10 200785 201468 592.6MB/s txt2 -0.3%
BM_UFlat/11 617267 610968 666.1MB/s txt3 +1.0%
BM_UFlat/12 821595 822475 558.7MB/s txt4 -0.1%
BM_UFlat/13 377097 377632 1.3GB/s bin -0.1%
BM_UFlat/14 45476 45260 805.8MB/s sum +0.5%
BM_UFlat/15 4985 5003 805.7MB/s man -0.4%
BM_UFlat/16 80813 77494 1.4GB/s pb +4.3%
BM_UFlat/17 251792 241553 727.7MB/s gaviota +4.2%
BM_UValidate/0 40343 40354 2.4GB/s html -0.0%
BM_UValidate/1 426890 451574 1.4GB/s urls -5.5%
BM_UValidate/2 187 179 661.9GB/s jpg +4.5%
BM_UValidate/3 13783 13827 6.4GB/s pdf -0.3%
BM_UValidate/4 162393 163335 2.3GB/s html4 -0.6%
BM_UDataBuffer/0 93756 93302 1046.7MB/s html +0.5%
BM_UDataBuffer/1 886714 916292 730.7MB/s urls -3.2%
BM_UDataBuffer/2 15861 16401 7.2GB/s jpg -3.3%
BM_UDataBuffer/3 38934 39224 2.2GB/s pdf -0.7%
BM_UDataBuffer/4 381008 379428 1029.5MB/s html4 +0.4%
BM_UCord/0 92528 91098 1072.0MB/s html +1.6%
BM_UCord/1 858421 885287 756.3MB/s urls -3.0%
BM_UCord/2 13140 13464 8.8GB/s jpg -2.4%
BM_UCord/3 39012 37773 2.3GB/s pdf +3.3%
BM_UCord/4 376869 371267 1052.1MB/s html4 +1.5%
BM_UCordString/0 75810 75303 1.3GB/s html +0.7%
BM_UCordString/1 735290 753841 888.2MB/s urls -2.5%
BM_UCordString/2 11945 13113 9.0GB/s jpg -8.9%
BM_UCordString/3 33901 32562 2.7GB/s pdf +4.1%
BM_UCordString/4 310985 309390 1.2GB/s html4 +0.5%
BM_UCordValidate/0 40952 40450 2.4GB/s html +1.2%
BM_UCordValidate/1 433842 456531 1.4GB/s urls -5.0%
BM_UCordValidate/2 1179 1173 100.8GB/s jpg +0.5%
BM_UCordValidate/3 14481 14392 6.1GB/s pdf +0.6%
BM_UCordValidate/4 164364 164151 2.3GB/s html4 +0.1%
BM_ZFlat/0 160610 156601 623.6MB/s html (22.31 %) +2.6%
BM_ZFlat/1 1995238 1993582 335.9MB/s urls (47.77 %) +0.1%
BM_ZFlat/2 30133 24983 4.7GB/s jpg (99.87 %) +20.6%
BM_ZFlat/3 74453 73128 1.2GB/s pdf (82.07 %) +1.8%
BM_ZFlat/4 647674 633729 616.4MB/s html4 (22.51 %) +2.2%
BM_ZFlat/5 76259 76090 308.4MB/s cp (48.12 %) +0.2%
BM_ZFlat/6 31106 31084 342.1MB/s c (42.40 %) +0.1%
BM_ZFlat/7 10507 10443 339.8MB/s lsp (48.37 %) +0.6%
BM_ZFlat/8 1811047 1793325 547.6MB/s xls (41.23 %) +1.0%
BM_ZFlat/9 597903 581793 249.3MB/s txt1 (57.87 %) +2.8%
BM_ZFlat/10 525320 514522 232.0MB/s txt2 (61.93 %) +2.1%
BM_ZFlat/11 1596591 1551636 262.3MB/s txt3 (54.92 %) +2.9%
BM_ZFlat/12 2134523 2094033 219.5MB/s txt4 (66.22 %) +1.9%
BM_ZFlat/13 593024 587869 832.6MB/s bin (18.11 %) +0.9%
BM_ZFlat/14 114746 110666 329.5MB/s sum (48.96 %) +3.7%
BM_ZFlat/15 14376 14485 278.3MB/s man (59.36 %) -0.8%
BM_ZFlat/16 167908 150070 753.6MB/s pb (19.64 %) +11.9%
BM_ZFlat/17 460228 442253 397.5MB/s gaviota (37.72 %) +4.1%
BM_ZCord/0 164896 160241 609.4MB/s html +2.9%
BM_ZCord/1 2070239 2043492 327.7MB/s urls +1.3%
BM_ZCord/2 54402 47002 2.5GB/s jpg +15.7%
BM_ZCord/3 85871 83832 1073.1MB/s pdf +2.4%
BM_ZCord/4 664078 648825 602.0MB/s html4 +2.4%
BM_ZDataBuffer/0 174874 172549 566.0MB/s html +1.3%
BM_ZDataBuffer/1 2134410 2139173 313.0MB/s urls -0.2%
BM_ZDataBuffer/2 71911 69551 1.7GB/s jpg +3.4%
BM_ZDataBuffer/3 98236 99727 902.1MB/s pdf -1.5%
BM_ZDataBuffer/4 710776 699104 558.8MB/s html4 +1.7%
Sum of all benchmarks 27358908 27200688 +0.6%
Sandy Bridge 2.6 GHz:
Benchmark Base (ns) New (ns) Improvement
-------------------------------------------------------------------------------------------------
BM_UFlat/0 49356 49018 1.9GB/s html +0.7%
BM_UFlat/1 516764 531955 1.2GB/s urls -2.9%
BM_UFlat/2 6982 7304 16.2GB/s jpg -4.4%
BM_UFlat/3 15285 15598 5.6GB/s pdf -2.0%
BM_UFlat/4 206557 206669 1.8GB/s html4 -0.1%
BM_UFlat/5 13681 13567 1.7GB/s cp +0.8%
BM_UFlat/6 6571 6592 1.6GB/s c -0.3%
BM_UFlat/7 2008 1994 1.7GB/s lsp +0.7%
BM_UFlat/8 775700 773286 1.2GB/s xls +0.3%
BM_UFlat/9 165578 164480 881.8MB/s txt1 +0.7%
BM_UFlat/10 143707 144139 828.2MB/s txt2 -0.3%
BM_UFlat/11 443026 436281 932.8MB/s txt3 +1.5%
BM_UFlat/12 603129 595856 771.2MB/s txt4 +1.2%
BM_UFlat/13 271682 270450 1.8GB/s bin +0.5%
BM_UFlat/14 26200 25666 1.4GB/s sum +2.1%
BM_UFlat/15 2620 2608 1.5GB/s man +0.5%
BM_UFlat/16 48908 47756 2.3GB/s pb +2.4%
BM_UFlat/17 174638 170346 1031.9MB/s gaviota +2.5%
BM_UValidate/0 31922 31898 3.0GB/s html +0.1%
BM_UValidate/1 341265 363554 1.8GB/s urls -6.1%
BM_UValidate/2 160 151 782.8GB/s jpg +6.0%
BM_UValidate/3 10402 10380 8.5GB/s pdf +0.2%
BM_UValidate/4 129490 130587 2.9GB/s html4 -0.8%
BM_UDataBuffer/0 59383 58736 1.6GB/s html +1.1%
BM_UDataBuffer/1 619222 637786 1049.8MB/s urls -2.9%
BM_UDataBuffer/2 10775 11941 9.9GB/s jpg -9.8%
BM_UDataBuffer/3 18002 17930 4.9GB/s pdf +0.4%
BM_UDataBuffer/4 259182 259306 1.5GB/s html4 -0.0%
BM_UCord/0 59379 57814 1.6GB/s html +2.7%
BM_UCord/1 598456 615162 1088.4MB/s urls -2.7%
BM_UCord/2 8519 8628 13.7GB/s jpg -1.3%
BM_UCord/3 18123 17537 5.0GB/s pdf +3.3%
BM_UCord/4 252375 252331 1.5GB/s html4 +0.0%
BM_UCordString/0 49494 49790 1.9GB/s html -0.6%
BM_UCordString/1 524659 541803 1.2GB/s urls -3.2%
BM_UCordString/2 8206 8354 14.2GB/s jpg -1.8%
BM_UCordString/3 17235 16537 5.3GB/s pdf +4.2%
BM_UCordString/4 210188 211072 1.8GB/s html4 -0.4%
BM_UCordValidate/0 31956 31587 3.0GB/s html +1.2%
BM_UCordValidate/1 340828 362141 1.8GB/s urls -5.9%
BM_UCordValidate/2 783 744 158.9GB/s jpg +5.2%
BM_UCordValidate/3 10543 10462 8.4GB/s pdf +0.8%
BM_UCordValidate/4 130150 129789 2.9GB/s html4 +0.3%
BM_ZFlat/0 113873 111200 878.2MB/s html (22.31 %) +2.4%
BM_ZFlat/1 1473023 1489858 449.4MB/s urls (47.77 %) -1.1%
BM_ZFlat/2 23569 19486 6.1GB/s jpg (99.87 %) +21.0%
BM_ZFlat/3 49178 48046 1.8GB/s pdf (82.07 %) +2.4%
BM_ZFlat/4 475063 469394 832.2MB/s html4 (22.51 %) +1.2%
BM_ZFlat/5 46910 46816 501.2MB/s cp (48.12 %) +0.2%
BM_ZFlat/6 16883 16916 628.6MB/s c (42.40 %) -0.2%
BM_ZFlat/7 5381 5447 651.5MB/s lsp (48.37 %) -1.2%
BM_ZFlat/8 1466870 1473861 666.3MB/s xls (41.23 %) -0.5%
BM_ZFlat/9 468006 464101 312.5MB/s txt1 (57.87 %) +0.8%
BM_ZFlat/10 408157 408957 291.9MB/s txt2 (61.93 %) -0.2%
BM_ZFlat/11 1253348 1232910 330.1MB/s txt3 (54.92 %) +1.7%
BM_ZFlat/12 1702373 1702977 269.8MB/s txt4 (66.22 %) -0.0%
BM_ZFlat/13 439792 438557 1116.0MB/s bin (18.11 %) +0.3%
BM_ZFlat/14 80766 78851 462.5MB/s sum (48.96 %) +2.4%
BM_ZFlat/15 7420 7542 534.5MB/s man (59.36 %) -1.6%
BM_ZFlat/16 112043 100126 1.1GB/s pb (19.64 %) +11.9%
BM_ZFlat/17 368877 357703 491.4MB/s gaviota (37.72 %) +3.1%
BM_ZCord/0 116402 113564 859.9MB/s html +2.5%
BM_ZCord/1 1507156 1519911 440.5MB/s urls -0.8%
BM_ZCord/2 39860 33686 3.5GB/s jpg +18.3%
BM_ZCord/3 56211 54694 1.6GB/s pdf +2.8%
BM_ZCord/4 485594 479212 815.1MB/s html4 +1.3%
BM_ZDataBuffer/0 123185 121572 803.3MB/s html +1.3%
BM_ZDataBuffer/1 1569111 1589380 421.3MB/s urls -1.3%
BM_ZDataBuffer/2 53143 49556 2.4GB/s jpg +7.2%
BM_ZDataBuffer/3 65725 66826 1.3GB/s pdf -1.6%
BM_ZDataBuffer/4 517871 514750 758.9MB/s html4 +0.6%
Sum of all benchmarks 20258879 20315484 -0.3%
AMD Instanbul 2.4 GHz:
Benchmark Base (ns) New (ns) Improvement
-------------------------------------------------------------------------------------------------
BM_UFlat/0 97120 96585 1011.1MB/s html +0.6%
BM_UFlat/1 917473 948016 706.3MB/s urls -3.2%
BM_UFlat/2 21496 23938 4.9GB/s jpg -10.2%
BM_UFlat/3 44751 45639 1.9GB/s pdf -1.9%
BM_UFlat/4 391950 391413 998.0MB/s html4 +0.1%
BM_UFlat/5 37366 37201 630.7MB/s cp +0.4%
BM_UFlat/6 18350 18318 580.5MB/s c +0.2%
BM_UFlat/7 5672 5661 626.9MB/s lsp +0.2%
BM_UFlat/8 1533390 1529441 642.1MB/s xls +0.3%
BM_UFlat/9 335477 336553 431.0MB/s txt1 -0.3%
BM_UFlat/10 285140 292080 408.7MB/s txt2 -2.4%
BM_UFlat/11 888507 894758 454.9MB/s txt3 -0.7%
BM_UFlat/12 1187643 1210928 379.5MB/s txt4 -1.9%
BM_UFlat/13 493717 507447 964.5MB/s bin -2.7%
BM_UFlat/14 61740 60870 599.1MB/s sum +1.4%
BM_UFlat/15 7211 7187 560.9MB/s man +0.3%
BM_UFlat/16 97435 93100 1.2GB/s pb +4.7%
BM_UFlat/17 362662 356395 493.2MB/s gaviota +1.8%
BM_UValidate/0 47475 47118 2.0GB/s html +0.8%
BM_UValidate/1 501304 529741 1.2GB/s urls -5.4%
BM_UValidate/2 276 243 486.2GB/s jpg +13.6%
BM_UValidate/3 16361 16261 5.4GB/s pdf +0.6%
BM_UValidate/4 190741 190353 2.0GB/s html4 +0.2%
BM_UDataBuffer/0 111080 109771 889.6MB/s html +1.2%
BM_UDataBuffer/1 1051035 1085999 616.5MB/s urls -3.2%
BM_UDataBuffer/2 25801 25463 4.6GB/s jpg +1.3%
BM_UDataBuffer/3 50493 49946 1.8GB/s pdf +1.1%
BM_UDataBuffer/4 447258 444138 879.5MB/s html4 +0.7%
BM_UCord/0 109350 107909 905.0MB/s html +1.3%
BM_UCord/1 1023396 1054964 634.7MB/s urls -3.0%
BM_UCord/2 25292 24371 4.9GB/s jpg +3.8%
BM_UCord/3 48955 49736 1.8GB/s pdf -1.6%
BM_UCord/4 440452 437331 893.2MB/s html4 +0.7%
BM_UCordString/0 98511 98031 996.2MB/s html +0.5%
BM_UCordString/1 933230 963495 694.9MB/s urls -3.1%
BM_UCordString/2 23311 24076 4.9GB/s jpg -3.2%
BM_UCordString/3 45568 46196 1.9GB/s pdf -1.4%
BM_UCordString/4 397791 396934 984.1MB/s html4 +0.2%
BM_UCordValidate/0 47537 46921 2.0GB/s html +1.3%
BM_UCordValidate/1 505071 532716 1.2GB/s urls -5.2%
BM_UCordValidate/2 1663 1621 72.9GB/s jpg +2.6%
BM_UCordValidate/3 16890 16926 5.2GB/s pdf -0.2%
BM_UCordValidate/4 192365 191984 2.0GB/s html4 +0.2%
BM_ZFlat/0 184708 179103 545.3MB/s html (22.31 %) +3.1%
BM_ZFlat/1 2293864 2302950 290.7MB/s urls (47.77 %) -0.4%
BM_ZFlat/2 52852 47618 2.5GB/s jpg (99.87 %) +11.0%
BM_ZFlat/3 100766 96179 935.3MB/s pdf (82.07 %) +4.8%
BM_ZFlat/4 741220 727977 536.6MB/s html4 (22.51 %) +1.8%
BM_ZFlat/5 85402 85418 274.7MB/s cp (48.12 %) -0.0%
BM_ZFlat/6 36558 36494 291.4MB/s c (42.40 %) +0.2%
BM_ZFlat/7 12706 12507 283.7MB/s lsp (48.37 %) +1.6%
BM_ZFlat/8 2336823 2335688 420.5MB/s xls (41.23 %) +0.0%
BM_ZFlat/9 701804 681153 212.9MB/s txt1 (57.87 %) +3.0%
BM_ZFlat/10 606700 597194 199.9MB/s txt2 (61.93 %) +1.6%
BM_ZFlat/11 1852283 1803238 225.7MB/s txt3 (54.92 %) +2.7%
BM_ZFlat/12 2475527 2443354 188.1MB/s txt4 (66.22 %) +1.3%
BM_ZFlat/13 694497 696654 702.6MB/s bin (18.11 %) -0.3%
BM_ZFlat/14 136929 129855 280.8MB/s sum (48.96 %) +5.4%
BM_ZFlat/15 17172 17124 235.4MB/s man (59.36 %) +0.3%
BM_ZFlat/16 190364 171763 658.4MB/s pb (19.64 %) +10.8%
BM_ZFlat/17 567285 555190 316.6MB/s gaviota (37.72 %) +2.2%
BM_ZCord/0 193490 187031 522.1MB/s html +3.5%
BM_ZCord/1 2427537 2415315 277.2MB/s urls +0.5%
BM_ZCord/2 85378 81412 1.5GB/s jpg +4.9%
BM_ZCord/3 121898 119419 753.3MB/s pdf +2.1%
BM_ZCord/4 779564 762961 512.0MB/s html4 +2.2%
BM_ZDataBuffer/0 213820 207272 471.1MB/s html +3.2%
BM_ZDataBuffer/1 2589010 2586495 258.9MB/s urls +0.1%
BM_ZDataBuffer/2 121871 118885 1018.4MB/s jpg +2.5%
BM_ZDataBuffer/3 145382 145986 616.2MB/s pdf -0.4%
BM_ZDataBuffer/4 868117 852754 458.1MB/s html4 +1.8%
Sum of all benchmarks 33771833 33744763 +0.1%
git-svn-id: http://snappy.googlecode.com/svn/trunk@71 03e5f5b5-db94-4691-08a0-1a8bf15f6143
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it leaves the source in a state that's not appropriate for RawUncompress.
R=sanjay
git-svn-id: http://snappy.googlecode.com/svn/trunk@67 03e5f5b5-db94-4691-08a0-1a8bf15f6143
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warnings. There are still some in the unit test, but the main .cc file should
be clean. We haven't enabled -Wall for the default build, since the unit test
is still not clean.
This also fixes a real bug in the open-source implementation of
ReadFileToStringOrDie(); it would not detect errors correctly.
I had to go through some pains to avoid performance loss as the types
were changed; I think there might still be some with 32-bit if and only if LFS
is enabled (ie., size_t is 64-bit), but for regular 32-bit and 64-bit I can't
see any losses, and I've diffed the generated GCC assembler between the old and
new code without seeing any significant choices. If anything, it's ever so
slightly faster.
This may or may not enable compression of very large blocks (>2^32 bytes)
when size_t is 64-bit, but I haven't checked, and it is still not a supported
case.
git-svn-id: http://snappy.googlecode.com/svn/trunk@56 03e5f5b5-db94-4691-08a0-1a8bf15f6143
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license header change.
R=csilvers
DELTA=5 (4 added, 0 deleted, 1 changed)
Revision created by MOE tool push_codebase.
MOE_MIGRATION=1094
git-svn-id: http://snappy.googlecode.com/svn/trunk@22 03e5f5b5-db94-4691-08a0-1a8bf15f6143
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Replace the Apache 2.0 license header by the BSD-type license header;
somehow a lot of the files were missed in the last round.
R=dannyb,csilvers
DELTA=147 (74 added, 2 deleted, 71 changed)
Change on 2011-03-25 19:25:07-07:00 by sesse
Unbreak the build; the relicensing removed a bit too much (only comments
were intended, but I also accidentially removed some of the top lines of
the actual source).
Revision created by MOE tool push_codebase.
MOE_MIGRATION=1072
git-svn-id: http://snappy.googlecode.com/svn/trunk@21 03e5f5b5-db94-4691-08a0-1a8bf15f6143
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MOE_MIGRATION=
git-svn-id: http://snappy.googlecode.com/svn/trunk@2 03e5f5b5-db94-4691-08a0-1a8bf15f6143
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