time.Sleep(1 * time.Millisecond)
		}
	}

	runtime.GC()

	runtime.ReadMemStats(&stats2)

	if int(stats2.HeapObjects)-int(stats1.HeapObjects) > 20 { // normally at most 1 or 2; was 300 with leak
		print("BUG: object leak: ", stats.HeapObjects, " -> ", stats1.HeapObjects, " -> ", stats2.HeapObjects, "\n")
	}

	preHeapObjects := stats.HeapObjects

	for i := 0; i < num; i++ {
		withNoEscape()
	}

	runtime.ReadMemStats(&stats)
	nowHeapObjects := stats.HeapObjects

	if nowHeapObjects-preHeapObjects >= num {
		fmt.Printf("too many heap objects allocated, pre: %v, now: %v\n", preHeapObjects, nowHeapObjects)
	}

	runtime.ReadMemStats(&stats)
	preHeapObjects = stats.HeapObjects

	for i := 0; i < num; i++ {

		if i%100 == 0 {
			for j := 0; j < 4; j++ {
				runtime.GC()
				runtime.Gosched()
				runtime.GC()
				runtime.Gosched()
			}
		}
	}

	runtime.ReadMemStats(memstats)
	obj := int64(memstats.HeapObjects - st.HeapObjects)
	if obj > N/5 {
		fmt.Println("too many objects left:", obj)
		os.Exit(1)
	}

    <tr>
        <td>HeapReleased</td>
        <td id="HeapReleased">{{.HeapReleased}} bytes</td>
        <td>Physical memory returned to the OS.</td>
    </tr>

    <tr>
        <td>HeapObjects</td>
        <td id="HeapObjects">{{.HeapObjects}} objects</td>
        <td>Number of allocated heap objects.</td>
    </tr>

    <tr>
        <td>StackInuse</td>
        <td id="StackInuse">{{.StackInuse}} bytes</td>