github.com/reiver/go@v0.0.0-20150109200633-1d0c7792f172/test/fixedbugs/bug369.go (about) 1 // +build !nacl,!windows 2 // run 3 4 // Copyright 2011 The Go Authors. All rights reserved. 5 // Use of this source code is governed by a BSD-style 6 // license that can be found in the LICENSE file. 7 8 // Test that compiling with optimization turned on produces faster code. 9 10 package main 11 12 import ( 13 "fmt" 14 "go/build" 15 "os" 16 "os/exec" 17 "path/filepath" 18 ) 19 20 func main() { 21 a, err := build.ArchChar(build.Default.GOARCH) 22 check(err) 23 24 err = os.Chdir(filepath.Join(".", "fixedbugs", "bug369.dir")) 25 check(err) 26 27 run("go", "tool", a+"g", "-N", "-o", "slow."+a, "pkg.go") 28 run("go", "tool", a+"g", "-o", "fast."+a, "pkg.go") 29 run("go", "tool", a+"g", "-o", "main."+a, "main.go") 30 run("go", "tool", a+"l", "-o", "a.exe", "main."+a) 31 run("." + string(filepath.Separator) + "a.exe") 32 33 os.Remove("slow." + a) 34 os.Remove("fast." + a) 35 os.Remove("main." + a) 36 os.Remove("a.exe") 37 } 38 39 func run(name string, args ...string) { 40 cmd := exec.Command(name, args...) 41 out, err := cmd.CombinedOutput() 42 if err != nil { 43 fmt.Println(string(out)) 44 fmt.Println(err) 45 os.Exit(1) 46 } 47 } 48 49 func check(err error) { 50 if err != nil { 51 fmt.Println(err) 52 os.Exit(1) 53 } 54 }