这里分类和汇总了欣宸的全部原创(含配套源码):https://github.com/zq2599/blog_demos
-《Go语言基准测试(benchmark)三部曲》已近尾声,经历了《基础篇》和《内存篇》的实战演练,相信您已熟练掌握了基准测试的常规操作以及各种参数的用法,现在可以学习一些进阶版的技能了,在面对复杂一些的场景也能高效完成基准测试,另外还有几个坑也要提前了解,避免以后掉进去
func BenchmarkFib(b *testing.B) {
for n := 0; n < b.N; n++ {
fib(30)
}
}
// BenchmarkFibWithPrepare 进入正式测试前需要耗时做准备工作的case
func BenchmarkFibWithPrepare(b *testing.B) {
// 假设这里有个耗时800毫秒的初始化操作
<-time.After(800 * time.Millisecond)
// 这下面才是咱们真正想做基准测试的代码
for n := 0; n < b.N; n++ {
fib(30)
}
}
go test -bench='BenchmarkFib|BenchmarkFibWithPrepare' benchmark-demo
goos: darwin
goarch: arm64
pkg: benchmark-demo
BenchmarkFib-8 325 3637442 ns/op
BenchmarkFibWithPrepare-8 50 20173566 ns/op
PASS
ok benchmark-demo 14.871s
go test -bench='BenchmarkFib|BenchmarkFibWithPrepare' benchmark-demo
goos: darwin
goarch: arm64
pkg: benchmark-demo
BenchmarkFib-8 325 3616239 ns/op
BenchmarkFibWithPrepare-8 316 3729323 ns/op
PASS
ok benchmark-demo 5.628s
func BenchmarkFibWithClean(b *testing.B) {
// 这下面才是咱们真正想做基准测试的代码
for n := 0; n < b.N; n++ {
fib(30)
// 假设这里有个耗时100毫秒的清理操作
<-time.After(10 * time.Millisecond)
}
}
go test -bench='BenchmarkFib$|BenchmarkFibWithClean' benchmark-demo
goos: darwin
goarch: arm64
pkg: benchmark-demo
BenchmarkFib-8 322 3610100 ns/op
BenchmarkFibWithClean-8 81 16139196 ns/op
PASS
ok benchmark-demo 3.002s
// BenchmarkFibWithClean 假设每次执行完fib方法后,都要做一次清理操作
func BenchmarkFibWithClean(b *testing.B) {
// 这下面才是咱们真正想做基准测试的代码
for n := 0; n < b.N; n++ {
// 继续记录耗时
b.StartTimer()
fib(30)
// 停止记录耗时
b.StopTimer()
// 假设这里有个耗时100毫秒的清理操作
<-time.After(10 * time.Millisecond)
}
}
go test -bench='BenchmarkFib$|BenchmarkFibWithClean' benchmark-demo
goos: darwin
goarch: arm64
pkg: benchmark-demo
BenchmarkFib-8 325 3631020 ns/op
BenchmarkFibWithClean-8 241 7448678 ns/op
PASS
ok benchmark-demo 7.751s
// BenchmarkFibWrongA 演示了错误的基准测试代码,这样的测试可能无法结束
func BenchmarkFibWrongA(b *testing.B) {
for n := 0; n < b.N; n++ {
fib(n)
}
}
func BenchmarkFibWrongB(b *testing.B) {
fib(b.N)
}