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March 11, 2020 06:20
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Profile a Go program
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| import ( | |
| "fmt" | |
| "os" | |
| "github.com/pkg/profile" | |
| ) | |
| func main() { | |
| p := profile.Start(profile.CPUProfile, profile.ProfilePath("."), profile.NoShutdownHook) | |
| defer p.Stop() | |
| // catch ^C and stop the profiler | |
| c := make(chan os.Signal, 1) | |
| signal.Notify(c, os.Interrupt) | |
| go func() { | |
| for sig := range c { | |
| // sig is a ^C, handle it | |
| fmt.Println(sig.String()) | |
| p.Stop() | |
| os.Exit(1) | |
| } | |
| }() | |
| } | |
| // # read the pprof file | |
| // # show top 10 nodes | |
| // go tool pprof cpu.pprof | |
| // (pprof) top | |
| // output ... |
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