[TOC] ## 實例 ``` package main import ( "flag" "log" "os" "runtime" "runtime/pprof" ) var cpuprofile = flag.String("cpuprofile", "", "write cpu profile to `file`") var memprofile = flag.String("memprofile", "", "write memory profile to `file`") func main() { flag.Parse() if *cpuprofile != "" { f, err := os.Create(*cpuprofile) if err != nil { log.Fatal("could not create CPU profile: ", err) } defer f.Close() // error handling omitted for example if err := pprof.StartCPUProfile(f); err != nil { log.Fatal("could not start CPU profile: ", err) } defer pprof.StopCPUProfile() } // ... rest of the program ... if *memprofile != "" { f, err := os.Create(*memprofile) if err != nil { log.Fatal("could not create memory profile: ", err) } defer f.Close() // error handling omitted for example runtime.GC() // get up-to-date statistics if err := pprof.WriteHeapProfile(f); err != nil { log.Fatal("could not write memory profile: ", err) } } } ``` 解析 ``` go tool pprof cpuprofile.txt ```