libgo/go/runtime/closure_test.go

   1 // Copyright 2011 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 runtime_test
   6
   7 import "testing"
   8
   9 var s int
  10
  11 func BenchmarkCallClosure(b *testing.B) {
  12         for i := 0; i < b.N; i++ {
  13                 s += func(ii int) int { return 2 * ii }(i)
  14         }
  15 }
  16
  17 func BenchmarkCallClosure1(b *testing.B) {
  18         for i := 0; i < b.N; i++ {
  19                 j := i
  20                 s += func(ii int) int { return 2*ii + j }(i)
  21         }
  22 }
  23
  24 var ss *int
  25
  26 func BenchmarkCallClosure2(b *testing.B) {
  27         for i := 0; i < b.N; i++ {
  28                 j := i
  29                 s += func() int {
  30                         ss = &j
  31                         return 2
  32                 }()
  33         }
  34 }
  35
  36 func addr1(x int) *int {
  37         return func() *int { return &x }()
  38 }
  39
  40 func BenchmarkCallClosure3(b *testing.B) {
  41         for i := 0; i < b.N; i++ {
  42                 ss = addr1(i)
  43         }
  44 }
  45
  46 func addr2() (x int, p *int) {
  47         return 0, func() *int { return &x }()
  48 }
  49
  50 func BenchmarkCallClosure4(b *testing.B) {
  51         for i := 0; i < b.N; i++ {
  52                 _, ss = addr2()
  53         }
  54 }