return nil, err
	}
	res.Body.Close()
	return res, nil
}

// A benchmark for profiling the client without the HTTP server code.
// The server code runs in a subprocess.
func BenchmarkClient(b *testing.B) {
	b.ReportAllocs()
	b.StopTimer()
	defer afterTest(b)

	var data = []byte("Hello world.\n")
	if server := os.Getenv("TEST_BENCH_SERVER"); server != "" {
		// Server process mode.