diff options
author | Russ Cox <rsc@golang.org> | 2011-11-15 12:49:22 -0500 |
---|---|---|
committer | Russ Cox <rsc@golang.org> | 2011-11-15 12:49:22 -0500 |
commit | 2d37fa1cba7cfe70dbfbf927b820aa22b455733b (patch) | |
tree | 6c8fea9eec8590300bd76b9ca9512561bdad44e8 /misc | |
parent | a1ce7c2d1d568317e735c8aa8e6b1ba336d4bfaf (diff) | |
download | go-2d37fa1cba7cfe70dbfbf927b820aa22b455733b.tar.gz |
misc/benchcmp: benchmark comparison script
I've been using this since April and posted it on the
mailing list, but it seems worth having in the repository.
Not sure about the location.
R=golang-dev, r, r
CC=golang-dev
http://codereview.appspot.com/5371100
Diffstat (limited to 'misc')
-rwxr-xr-x | misc/benchcmp | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/misc/benchcmp b/misc/benchcmp new file mode 100755 index 000000000..110c3429e --- /dev/null +++ b/misc/benchcmp @@ -0,0 +1,66 @@ +#!/bin/sh +# Copyright 2011 The Go Authors. All rights reserved. +# Use of this source code is governed by a BSD-style +# license that can be found in the LICENSE file. + +case "$1" in +-*) + echo 'usage: benchcmp old.txt new.txt' >&2 + echo >&2 + echo 'Each input file should be gotest -bench output.' >&2 + echo 'Benchcmp compares the first and last for each benchmark.' >&2 + exit 2 +esac + +awk ' +BEGIN { + n = 0 +} + +$1 ~ /^Benchmark/ && $4 == "ns/op" { + if(old[$1]) { + if(!saw[$1]++) { + name[n++] = $1 + if(length($1) > len) + len = length($1) + } + new[$1] = $3 + if($6 == "MB/s") + newmb[$1] = $5 + } else { + old[$1] = $3 + if($6 = "MB/s") + oldmb[$1] = $5 + } +} + +END { + if(n == 0) { + print "benchcmp: no repeated benchmarks" >"/dev/stderr" + exit 1 + } + + printf("%-*s %12s %12s %7s\n", len, "benchmark", "old ns/op", "new ns/op", "delta") + + # print ns/op + for(i=0; i<n; i++) { + what = name[i] + printf("%-*s %12d %12d %6s%%\n", len, what, old[what], new[what], + sprintf("%+.2f", 100*new[what]/old[what]-100)) + } + + # print mb/s + anymb = 0 + for(i=0; i<n; i++) { + what = name[i] + if(!(what in newmb)) + continue + if(anymb++ == 0) + printf("\n%-*s %12s %12s %7s\n", len, "benchmark", "old MB/s", "new MB/s", "speedup") + printf("%-*s %12s %12s %6sx\n", len, what, + sprintf("%.2f", oldmb[what]), + sprintf("%.2f", newmb[what]), + sprintf("%.2f", newmb[what]/oldmb[what])) + } +} +' "$@" |