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go/printer: report allocs and set bytes

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We now get more than just time/op.

	name      time/op
	Print-16    6.29ms ± 3%

	name      speed
	Print-16  8.25MB/s ± 3%

	name      alloc/op
	Print-16     483kB ± 0%

	name      allocs/op
	Print-16     17.8k ± 0%

Change-Id: I6b5e9a30a826ff8603724bd5983e6b7f5ec12708
Reviewed-on: https://go-review.googlesource.com/c/go/+/412554
Reviewed-by: Robert Griesemer <gri@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Daniel Martí 2022-06-15 21:19:04 +01:00 committed by Gopher Robot
parent 3af5280c00
commit 85d7bab91d
1 changed files with 7 additions and 1 deletions
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8
src/go/printer/performance_test.go
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@ -17,7 +17,10 @@ import (
"testing" "testing"
) )
var testfile *ast.File var (
testfile *ast.File
testsize int64
)
func testprint(out io.Writer, file *ast.File) { func testprint(out io.Writer, file *ast.File) {
if err := (&Config{TabIndent | UseSpaces | normalizeNumbers, 8, 0}).Fprint(out, fset, file); err != nil { if err := (&Config{TabIndent | UseSpaces | normalizeNumbers, 8, 0}).Fprint(out, fset, file); err != nil {
@ -46,12 +49,15 @@ func initialize() {
} }
testfile = file testfile = file
testsize = int64(len(src))
} }
func BenchmarkPrint(b *testing.B) { func BenchmarkPrint(b *testing.B) {
if testfile == nil { if testfile == nil {
initialize() initialize()
} }
b.ReportAllocs()
b.SetBytes(testsize)
for i := 0; i < b.N; i++ { for i := 0; i < b.N; i++ {
testprint(io.Discard, testfile) testprint(io.Discard, testfile)
} }