libgo/go/go/parser/performance_test.go

   1 // Copyright 2012 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package parser
   6
   7 import (
   8         "go/token"
   9         "io/ioutil"
  10         "testing"
  11 )
  12
  13 var src = readFile("parser.go")
  14
  15 func readFile(filename string) []byte {
  16         data, err := ioutil.ReadFile(filename)
  17         if err != nil {
  18                 panic(err)
  19         }
  20         return data
  21 }
  22
  23 func BenchmarkParse(b *testing.B) {
  24         b.SetBytes(int64(len(src)))
  25         for i := 0; i < b.N; i++ {
  26                 if _, err := ParseFile(token.NewFileSet(), "", src, ParseComments); err != nil {
  27                         b.Fatalf("benchmark failed due to parse error: %s", err)
  28                 }
  29         }
  30 }