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encoding/json: make BenchmarkSkipValue more consistent 

Move scanner allocation out of loop.
It's the only allocation in the test so it dominates
when it triggers a garbage collection.

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5369117
This commit is contained in:
Russ Cox 2011-11-15 13:59:59 -05:00
parent cb85e8ac27
commit a6106eef37
1 changed files with 3 additions and 2 deletions
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5
src/pkg/encoding/json/scanner_test.go
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@ -186,11 +186,12 @@ func TestNextValueBig(t *testing.T) {
} }
} }
var benchScan scanner
func BenchmarkSkipValue(b *testing.B) { func BenchmarkSkipValue(b *testing.B) {
initBig() initBig()
var scan scanner
for i := 0; i < b.N; i++ { for i := 0; i < b.N; i++ {
nextValue(jsonBig, &scan) nextValue(jsonBig, &benchScan)
} }
b.SetBytes(int64(len(jsonBig))) b.SetBytes(int64(len(jsonBig)))
} }