package main import ( "flag" "fmt" "log" "os" "runtime" "runtime/pprof" "time" "github.com/BurntSushi/xgb" "github.com/BurntSushi/xgb/xproto" ) var ( flagRequests int flagGOMAXPROCS int flagCpuProfName string flagMemProfName string ) func init() { flag.IntVar(&flagRequests, "requests", 100000, "Number of atoms to intern.") flag.IntVar(&flagGOMAXPROCS, "cpu", 1, "Value of GOMAXPROCS.") flag.StringVar(&flagCpuProfName, "cpuprof", "cpu.prof", "Name of CPU profile file.") flag.StringVar(&flagMemProfName, "memprof", "mem.prof", "Name of memory profile file.") flag.Parse() runtime.GOMAXPROCS(flagGOMAXPROCS) } func seqNames(n int) []string { names := make([]string, n) for i := range names { names[i] = fmt.Sprintf("NAME%d", i) } return names } func main() { X, err := xgb.NewConn() if err != nil { log.Fatal(err) } names := seqNames(flagRequests) fcpu, err := os.Create(flagCpuProfName) if err != nil { log.Fatal(err) } defer fcpu.Close() pprof.StartCPUProfile(fcpu) defer pprof.StopCPUProfile() start := time.Now() cookies := make([]xproto.InternAtomCookie, flagRequests) for i := 0; i < flagRequests; i++ { cookies[i] = xproto.InternAtom(X, false, uint16(len(names[i])), names[i]) } for _, cookie := range cookies { cookie.Reply() } fmt.Printf("Exec time: %s\n\n", time.Since(start)) fmem, err := os.Create(flagMemProfName) if err != nil { log.Fatal(err) } defer fmem.Close() pprof.WriteHeapProfile(fmem) memStats := &runtime.MemStats{} runtime.ReadMemStats(memStats) // This isn't right. I'm not sure what's wrong. lastGcTime := time.Unix(int64(memStats.LastGC/1000000000), int64(memStats.LastGC-memStats.LastGC/1000000000)) fmt.Printf("Alloc: %d\n", memStats.Alloc) fmt.Printf("TotalAlloc: %d\n", memStats.TotalAlloc) fmt.Printf("LastGC: %s\n", lastGcTime) fmt.Printf("PauseTotalNs: %d\n", memStats.PauseTotalNs) fmt.Printf("PauseNs: %d\n", memStats.PauseNs) fmt.Printf("NumGC: %d\n", memStats.NumGC) }