go performance_test 源码
golang performance_test 代码
文件路径：/src/go/parser/performance_test.go
// Copyright 2012 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.
package parser
import (
"go/token"
"os"
"testing"
)
// TODO(rfindley): use a testdata file or file from another package here, to
// avoid a moving target.
var src = readFile("parser.go")
func readFile(filename string) []byte {
data, err := os.ReadFile(filename)
if err != nil {
panic(err)
}
return data
}
func BenchmarkParse(b *testing.B) {
b.SetBytes(int64(len(src)))
for i := 0; i < b.N; i++ {
if _, err := ParseFile(token.NewFileSet(), "", src, ParseComments); err != nil {
b.Fatalf("benchmark failed due to parse error: %s", err)
}
}
}
func BenchmarkParseOnly(b *testing.B) {
b.SetBytes(int64(len(src)))
for i := 0; i < b.N; i++ {
if _, err := ParseFile(token.NewFileSet(), "", src, ParseComments|SkipObjectResolution); err != nil {
b.Fatalf("benchmark failed due to parse error: %s", err)
}
}
}
func BenchmarkResolve(b *testing.B) {
b.SetBytes(int64(len(src)))
for i := 0; i < b.N; i++ {
b.StopTimer()
fset := token.NewFileSet()
file, err := ParseFile(fset, "", src, SkipObjectResolution)
if err != nil {
b.Fatalf("benchmark failed due to parse error: %s", err)
}
b.StartTimer()
handle := fset.File(file.Package)
resolveFile(file, handle, nil)
}
}
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