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#!/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 go test -test.run=NONE -test.bench=. > [old,new].txt' >&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] = $5
}
}
END {
if(n == 0) {
print "benchcmp: no repeated benchmarks" >"/dev/stderr"
exit 1
}
printf("%-*s %12s %12s %7s\n", len, "benchmark", "old ns/op", "new ns/op", "delta")
# print ns/op
for(i=0; i<n; i++) {
what = name[i]
printf("%-*s %12d %12d %6s%%\n", len, what, old[what], new[what],
sprintf("%+.2f", 100*new[what]/old[what]-100))
}
# print mb/s
anymb = 0
for(i=0; i<n; i++) {
what = name[i]
if(!(what in newmb))
continue
if(anymb++ == 0)
printf("\n%-*s %12s %12s %7s\n", len, "benchmark", "old MB/s", "new MB/s", "speedup")
printf("%-*s %12s %12s %6sx\n", len, what,
sprintf("%.2f", oldmb[what]),
sprintf("%.2f", newmb[what]),
sprintf("%.2f", newmb[what]/oldmb[what]))
}
}
' "$@"
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