Golang B.StopTimer方法代碼示例

func BenchmarkCacheComplete(b *testing.B) {
	b.StopTimer()

	paths := DefaultPaths()
	if len(paths) == 0 {
		b.Skip("No default paths available")
	}

	tests := []string{"mscorlib.dll", "System.dll"}

	c := Cache{paths: paths}
	for _, test := range tests {
		if _, err := c.Load(test); err != nil {
			b.Error(err)
		}
	}

	tests2 := []content.Type{
		content.Type{Name: content.FullyQualifiedName{Absolute: "net://type/System.String"}},
	}
	b.StartTimer()
	for i := 0; i < b.N; i++ {
		for _, test := range tests2 {
			if _, err := c.Complete(&test); err != nil {
				b.Error(err)
			}
		}
	}
}

func doBenchmarkDbQuery(b *testing.B) {
	b.StopTimer()
	bas := new(basic)
	bas.Name = "Basic"
	bas.State = 3
	mg, _ := GetMigration()
	mg.DropTable(bas)
	mg.CreateTableIfNotExists(bas)
	q, _ := GetQbs()
	q.Save(bas)
	closeMigrationAndQbs(mg, q)
	b.StartTimer()
	db, _ := sql.Open(driver, driverSource)
	query := q.Dialect.substituteMarkers("SELECT * FROM basic WHERE id = ?")
	for i := 0; i < b.N; i++ {
		ba := new(basic)
		rows, err := db.Query(query, 1)
		if err != nil {
			panic(err)
		}
		rows.Next()
		err = rows.Scan(&ba.Id, &ba.Name, &ba.State)
		if err != nil {
			panic(err)
		}
		rows.Close()
	}
	db.Close()
	b.StopTimer()
	runtime.GC()
	stats := new(runtime.MemStats)
	runtime.ReadMemStats(stats)
	fmt.Printf("alloc:%d, total:%d\n", stats.Alloc, stats.TotalAlloc)
}

func BenchmarkExist(b *testing.B) {
	b.StopTimer()
	var d Interface
	if opt == "slice" {
		d = newMapToSlice()
	} else {
		d = newMapToMap()
	}
	k := "A"
	for _, v := range testVals {
		d.set(k, v)
	}

	// to make it not biased towards data structures
	// with an order, such as slice.
	ix := rand.Perm(testN)

	b.StartTimer()
	b.ReportAllocs()

	for _, idx := range ix {
		if !d.exist(k, testVals[idx]) {
			b.Errorf("%s should have existed!", testVals[idx])
		}
	}
}

func BenchmarkTopicToChannelPut(b *testing.B) {
	b.StopTimer()
	log.SetOutput(ioutil.Discard)
	defer log.SetOutput(os.Stdout)
	topicName := "bench_topic_to_channel_put" + strconv.Itoa(b.N)
	channelName := "bench"
	options := NewNSQDOptions()
	options.MemQueueSize = int64(b.N)
	_, _, nsqd := mustStartNSQD(options)
	defer nsqd.Exit()
	channel := nsqd.GetTopic(topicName).GetChannel(channelName)
	b.StartTimer()

	for i := 0; i <= b.N; i++ {
		topic := nsqd.GetTopic(topicName)
		msg := nsq.NewMessage(<-nsqd.idChan, []byte("aaaaaaaaaaaaaaaaaaaaaaaaaaa"))
		topic.PutMessage(msg)
	}

	for {
		if len(channel.memoryMsgChan) == b.N {
			break
		}
		runtime.Gosched()
	}
}

func BenchmarkPublishJsonStruct(b *testing.B) {
	// stop benchmark for set-up
	b.StopTimer()

	s := test.RunDefaultServer()
	defer s.Shutdown()

	ec := NewJsonEncodedConn(b)
	defer ec.Close()
	ch := make(chan bool)

	me := &person{Name: "derek", Age: 22, Address: "140 New Montgomery St"}
	me.Children = make(map[string]*person)

	me.Children["sam"] = &person{Name: "sam", Age: 19, Address: "140 New Montgomery St"}
	me.Children["meg"] = &person{Name: "meg", Age: 17, Address: "140 New Montgomery St"}

	ec.Subscribe("json_struct", func(p *person) {
		if !reflect.DeepEqual(p, me) {
			b.Fatalf("Did not receive the correct struct response")
		}
		ch <- true
	})

	// resume benchmark
	b.StartTimer()

	for n := 0; n < b.N; n++ {
		ec.Publish("json_struct", me)
		if e := test.Wait(ch); e != nil {
			b.Fatal("Did not receive the message")
		}
	}

}

func BenchmarkClientServer(b *testing.B) {
	b.ReportAllocs()
	b.StopTimer()
	handler, err := NewHandler(func(in Ping, out *Pong) error {
		if in.Data != "ping" {
			b.Fatalf("expected ping, got %q", in.Data)
		}
		out.Data = "pong"
		return nil
	})
	if err != nil {
		b.Fatalf("NewHandler: %v", err)
	}

	s := npctest.NewServer(handler)
	defer s.Close()

	c := NewClient([]string{s.Listener.Addr().String()})
	defer c.Close()

	b.StartTimer()
	for i := 0; i < b.N; i++ {
		var pong Pong
		err = c.Call(Ping{"ping"}, &pong)
		if err != nil {
			b.Fatalf("Call: %v", err)
		}
		if pong.Data != "pong" {
			b.Fatalf("expected pong, got %q", pong.Data)
		}
	}
}

func benchmarkEndToEnd(dial func() (*Client, error), b *testing.B) {
	b.StopTimer()
	once.Do(startServer)
	client, err := dial()
	if err != nil {
		b.Fatal("error dialing:", err)
	}

	// Synchronous calls
	args := &Args{7, 8}
	procs := runtime.GOMAXPROCS(-1)
	N := int32(b.N)
	var wg sync.WaitGroup
	wg.Add(procs)
	b.StartTimer()

	for p := 0; p < procs; p++ {
		go func() {
			reply := new(Reply)
			for atomic.AddInt32(&N, -1) >= 0 {
				err := client.Call("Arith.Add", args, reply)
				if err != nil {
					b.Fatalf("rpc error: Add: expected no error but got string %q", err.Error())
				}
				if reply.C != args.A+args.B {
					b.Fatalf("rpc error: Add: expected %d got %d", reply.C, args.A+args.B)
				}
			}
			wg.Done()
		}()
	}
	wg.Wait()
}

func bench(b *testing.B, size int, algo func(Interface), name string) {
	b.StopTimer()
	data := make(intPairs, size)
	x := ^uint32(0)
	for i := 0; i < b.N; i++ {
		for n := size - 3; n <= size+3; n++ {
			for i := 0; i < len(data); i++ {
				x += x
				x ^= 1
				if int32(x) < 0 {
					x ^= 0x88888eef
				}
				data[i].a = int(x % uint32(n/5))
			}
			data.initB()
			b.StartTimer()
			algo(data)
			b.StopTimer()
			if !IsSorted(data) {
				b.Errorf("%s did not sort %d ints", name, n)
			}
			if name == "Stable" && !data.inOrder() {
				b.Errorf("%s unstable on %d ints", name, n)
			}
		}
	}
}

func BenchmarkSecretConnection(b *testing.B) {
	b.StopTimer()
	fooSecConn, barSecConn := makeSecretConnPair(b)
	fooWriteText := RandStr(dataMaxSize)
	// Consume reads from bar's reader
	go func() {
		readBuffer := make([]byte, dataMaxSize)
		for {
			_, err := barSecConn.Read(readBuffer)
			if err == io.EOF {
				return
			} else if err != nil {
				b.Fatalf("Failed to read from barSecConn: %v", err)
			}
		}
	}()

	b.StartTimer()
	for i := 0; i < b.N; i++ {
		_, err := fooSecConn.Write([]byte(fooWriteText))
		if err != nil {
			b.Fatalf("Failed to write to fooSecConn: %v", err)
		}
	}
	b.StopTimer()

	fooSecConn.Close()
	//barSecConn.Close() race condition
}

func BenchmarkEncodeRGBOpaque(b *testing.B) {
	b.StopTimer()
	img := image.NewRGBA(image.Rect(0, 0, 640, 480))
	// Set all pixels to 0xFF alpha to force opaque mode.
	bo := img.Bounds()
	rnd := rand.New(rand.NewSource(123))
	for y := bo.Min.Y; y < bo.Max.Y; y++ {
		for x := bo.Min.X; x < bo.Max.X; x++ {
			img.Set(x, y, color.RGBA{
				uint8(rnd.Intn(256)),
				uint8(rnd.Intn(256)),
				uint8(rnd.Intn(256)),
				255})
		}
	}
	if !img.Opaque() {
		b.Fatal("expected image to be opaque")
	}
	b.SetBytes(640 * 480 * 4)
	b.StartTimer()
	options := &Options{Quality: 90}
	for i := 0; i < b.N; i++ {
		Encode(ioutil.Discard, img, options)
	}
}

func BenchmarkHelloRServer(b *testing.B) {
	test := func(k *kernel) {
		server := httptest.NewServer(k)
		defer server.Close()
		cli := &http.Client{Transport: &http.Transport{}}
		b.ResetTimer()
		defer b.StopTimer()
		for i := 0; i < b.N; i++ {
			body := bytes.NewBuffer([]byte(`{"name": "bigdatabob"}`))
			req, err := http.NewRequest("POST", server.URL, body)
			if err != nil {
				b.Errorf("could not create request: %v", err)
				return
			}
			req.Header.Set("Content-Type", "application/json")
			resp, err := cli.Do(req)
			if err != nil {
				b.Errorf("could not make a request: %v", err)
				return
			}
			if resp.StatusCode != http.StatusOK {
				b.Errorf("bad response from kernel: %s", resp.Status)
				return
			}
			resp.Body.Close()
		}
	}
	testDeployment(b, integration.RHello, test)
}

func BenchmarkDagmodWrite(b *testing.B) {
	b.StopTimer()
	dserv, pins := getMockDagServ(b)
	_, n := getNode(b, dserv, 0, pins)
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	wrsize := 4096

	dagmod, err := NewDagModifier(ctx, n, dserv, pins, sizeSplitterGen(512))
	if err != nil {
		b.Fatal(err)
	}

	buf := make([]byte, b.N*wrsize)
	u.NewTimeSeededRand().Read(buf)
	b.StartTimer()
	b.SetBytes(int64(wrsize))
	for i := 0; i < b.N; i++ {
		n, err := dagmod.Write(buf[i*wrsize : (i+1)*wrsize])
		if err != nil {
			b.Fatal(err)
		}
		if n != wrsize {
			b.Fatal("Wrote bad size")
		}
	}
}

func BenchmarkLanguage(b *testing.B) {
	b.StopTimer()
	tst := []string{
		"language.go",
		"testdata/main.go",
	}

	var d0 []string
	for _, s := range tst {
		if d, err := ioutil.ReadFile(s); err != nil {
			b.Errorf("Couldn't load file %s: %s", s, err)
		} else {
			d0 = append(d0, string(d))
		}
	}

	b.StartTimer()
	for i := 0; i < b.N; i++ {
		for j := range d0 {
			lp, err := NewLanguageParser("testdata/Go.tmLanguage", d0[j])
			if err != nil {
				b.Fatal(err)
				return
			}
			lp.Parse()
		}
	}
	fmt.Println(util.Prof)
}

// runBenchmarkInsert benchmarks inserting count rows into a table.
func runBenchmarkInsert(b *testing.B, db *gosql.DB, count int) {
	if _, err := db.Exec(`DROP TABLE IF EXISTS bench.insert`); err != nil {
		b.Fatal(err)
	}
	if _, err := db.Exec(`CREATE TABLE bench.insert (k INT PRIMARY KEY)`); err != nil {
		b.Fatal(err)
	}
	defer func() {
		if _, err := db.Exec(`DROP TABLE bench.insert`); err != nil {
			b.Fatal(err)
		}
	}()

	b.ResetTimer()
	var buf bytes.Buffer
	val := 0
	for i := 0; i < b.N; i++ {
		buf.Reset()
		buf.WriteString(`INSERT INTO bench.insert VALUES `)
		for j := 0; j < count; j++ {
			if j > 0 {
				buf.WriteString(", ")
			}
			fmt.Fprintf(&buf, "(%d)", val)
			val++
		}
		if _, err := db.Exec(buf.String()); err != nil {
			b.Fatal(err)
		}
	}
	b.StopTimer()

}

func doBenchmarkFind(b *testing.B) {
	b.StopTimer()
	bas := new(basic)
	bas.Name = "Basic"
	bas.State = 3
	mg, _ := GetMigration()
	mg.DropTable(bas)
	mg.CreateTableIfNotExists(bas)
	q, _ := GetQbs()
	q.Save(bas)
	closeMigrationAndQbs(mg, q)
	b.StartTimer()
	for i := 0; i < b.N; i++ {
		ba := new(basic)
		ba.Id = 1
		q, _ = GetQbs()
		err := q.Find(ba)
		if err != nil {
			panic(err)
		}
		q.Close()
	}
	b.StopTimer()
	runtime.GC()
	stats := new(runtime.MemStats)
	runtime.ReadMemStats(stats)
	fmt.Printf("alloc:%d, total:%d\n", stats.Alloc, stats.TotalAlloc)
}