What
How
Display
- go tool pprof -http=:9999 cpu.pprof
Benchmark & pprof
gen
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
func fib(n int) int {
if n == 0 || n == 1 {
return n
}
return fib(n-2) + fib(n-1)
}
func BenchmarkFib(b *testing.B) {
for n := 0; n < b.N; n++ {
fib(30) // run fib(30) b.N times
}
}
只需要在 go test 添加 -cpuprofile 参数即可生成 BenchmarkFib 对应的 CPU profile 文件：
$ go test -bench="Fib$" -cpuprofile=cpu.pprof .
goos: linux
goarch: amd64
pkg: example
BenchmarkFib-8 196 6071636 ns/op
PASS
ok example 2.046s