英文:
Go run performance
问题
考虑以下基准测试代码：
package main
import (
"io/ioutil"
"os"
"os/exec"
"testing"
)
func BenchmarkRun(b *testing.B) {
for i := 0; i < b.N; i++ {
source := `package main
import "fmt"
func main() {
fmt.Println("foo")
}`
if err := ioutil.WriteFile("cmd.go", []byte(source), 0777); err != nil {
b.Error(err)
}
defer os.Remove("cmd.go")
if err := exec.Command("go", "run", "cmd.go").Run(); err != nil {
b.Error(err)
}
}
}
每个操作大约需要0.3秒。
有没有办法加快编译/运行周期？
写一个临时文件并执行"go run"看起来有些笨拙。有没有一种方法可以在不这样做的情况下调用编译器？
英文:
Consider the following benchmark:
package main
import (
"io/ioutil"
"os"
"os/exec"
"testing"
)
func BenchmarkRun(b *testing.B) {
for i := 0; i < b.N; i++ {
source := `package main
import "fmt"
func main() {
fmt.Println("foo")
}`
if err := ioutil.WriteFile("cmd.go", []byte(source), 0777); err != nil {
b.Error(err)
}
defer os.Remove("cmd.go")
if err := exec.Command("go", "run", "cmd.go").Run(); err != nil {
b.Error(err)
}
}
}
This takes around 0.3sec per operation.
Is there any way of speeding up a compile / run cycle?
It seems clumsy to write a temporary file and exec go run. Is there a way to invoke the compiler without doing this?
答案1
得分: 1
你可以随时创建一个二进制文件，并在以后使用它。
示例：
package main
import (
"io/ioutil"
"os"
"os/exec"
"path"
"testing"
)
func BenchmarkRun(b *testing.B) {
tmpdir, err := ioutil.TempDir("", "go-bench-")
if err != nil {
b.Fatal(err)
}
defer os.RemoveAll(tmpdir)
source := `package main
import "fmt"
func main() {
fmt.Println("foo")
}`
if err := ioutil.WriteFile(path.Join(tmpdir, "cmd.go"), []byte(source), 0777); err != nil {
b.Fatal(err)
}
defer os.Remove(path.Join(tmpdir, "cmd.go"))
cmd := exec.Command("go", "build", "-o", "cmd", ".")
cmd.Dir = tmpdir
if err := cmd.Run(); err != nil {
b.Fatal(err)
}
defer os.Remove(path.Join(tmpdir, "cmd"))
b.ResetTimer()
for i := 0; i < b.N; i++ {
if err := exec.Command(path.Join(tmpdir, "cmd")).Run(); err != nil {
b.Error(err)
}
}
}
英文:
You can always create a binary and use it later on.
Example:
package main
import (
"io/ioutil"
"os"
"os/exec"
"path"
"testing"
)
func BenchmarkRun(b *testing.B) {
tmpdir, err := ioutil.TempDir("", "go-bench-")
if err != nil {
b.Fatal(err)
}
defer os.RemoveAll(tmpdir)
source := `package main
import "fmt"
func main() {
fmt.Println("foo")
}`
if err := ioutil.WriteFile(path.Join(tmpdir, "cmd.go"), []byte(source), 0777); err != nil {
b.Fatal(err)
}
defer os.Remove(path.Join(tmpdir, "cmd.go"))
cmd := exec.Command("go", "build", "-o", "cmd", ".")
cmd.Dir = tmpdir
if err := cmd.Run(); err != nil {
b.Fatal(err)
}
defer os.Remove(path.Join(tmpdir, "cmd"))
b.ResetTimer()
for i := 0; i < b.N; i++ {
if err := exec.Command(path.Join(tmpdir, "cmd")).Run(); err != nil {
b.Error(err)
}
}
}
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