blob: c507ec4f6f5916630cd0e89e701e912aca0d661b [file] [log] [blame]
// Copyright 2023 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
import (
// Run as a test, reports allocation time statistics for stack, heap, and globally
// allocated buffers, out to the 99.9999th percentile. Optionally reports worst
// allocation time if -worst is specified, but this is normally too noisy for any
// sort of trend tracking or alerting. The default test usually runs long enough that
// it requires only one iteration.
func TestMain(m *testing.M) {
flag.BoolVar(&reportWorstFlag, "worst", false, "report otherwise too-noisy 'worst' metric in benchmark")
type testCase struct {
howAlloc string
withFluff bool
func BenchmarkGCLatency(b *testing.B) {
tcs := []testCase{
{"stack", false},
{"stack", true},
{"heap", false},
{"heap", true},
{"global", false},
{"global", true},
if testing.Short() {
tcs = []testCase{
{"stack", false},
{"heap", false},
{"global", false},
for _, tc := range tcs {
lb := &LB{doFluff: tc.withFluff, howAllocated: tc.howAlloc}
b.Run(fmt.Sprintf("how=%s/fluff=%v", tc.howAlloc, tc.withFluff),
func(b *testing.B) { lb.bench(b) })