// Copyright 2018 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 main_test
import (
"internal/testenv"
"os/exec"
"testing"
)
// BenchmarkExecGoEnv measures how long it takes for 'go env GOARCH' to run.
// Since 'go' is executed, remember to run 'go install cmd/go' before running
// the benchmark if any changes were done.
func BenchmarkExecGoEnv(b *testing.B) {
testenv.MustHaveExec(b)
b.StopTimer()
gotool, err := testenv.GoTool()
if err != nil {
b.Fatal(err)
}
for i := 0; i < b.N; i++ {
cmd := exec.Command(gotool, "env", "GOARCH")
b.StartTimer()
err := cmd.Run()
b.StopTimer()
if err != nil {
b.Fatal(err)
}
}
}
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