StopWatch在单个文件的单个方法中确时还蛮好用的，但跨多个文件，多个方法的同一线程内调试就有明显的不舒服。一是要建立ThreadLocal共享StopWatch的实例。二是StopWatch的start和stop必须形成闭合。在方法嵌套的场景。比如要查看大方法执行时间，还要查看大方法里面的某个调用的执行时间。这就没法做到了。3就是StopWatch以纳秒为单位，阅读不舒服（非高并发网站，没那么高的要求，毫秒即可），因此，做了这款调试工作。只记录线程某些栈节点的抵达时间。形成一个时间轴。最后打印这个时间轴的相邻时间差即可。调试中，只要确定费时的代码在哪个小区间，一般有经验的话能很快定位到问题代码。
效果如下图：

代码实现：
有需要的可以拿去美化下

public class RunnerAnalyzer {

    private final static ThreadLocal<List<RunnerInfo>> CONTAINER = new ThreadLocal<>();

    public static void start(String nodeName) {
        List<RunnerInfo> runnerInfos = CONTAINER.get();
        if (null == runnerInfos) {
            CONTAINER.set(new ArrayList<>());
        }
        List<RunnerInfo> container = CONTAINER.get();
        container.add(new RunnerInfo(nodeName));
        CONTAINER.set(container);
    }


    public static void clear() {
        CONTAINER.remove();
    }

  public static void prettyPrint(long moreThanTime) {
        RunnerAnalyzer.start("耗时记录结束");
        List<RunnerInfo> runnerInfos = CONTAINER.get();
        if (null == runnerInfos) {
             clear();
            return;
        }


        int size = runnerInfos.size();
        int lastIndex = size - 1;

        RunnerInfo first = runnerInfos.get(0);
        RunnerInfo last = runnerInfos.get(lastIndex);

        long totalTime = last.getTime() - first.getTime();
        // 只打印超过某一时间的，免得压力测试的时候疯狂刷
        if (totalTime < moreThanTime) {
            clear();
            return;
        }

        StringBuilder sb = new StringBuilder();
        sb.append("---------------------------------------------
");

        String totalMessage = "总耗时" + totalTime + "
";
        sb.append(totalMessage);


        String title = "抵达时间                    耗时       占比         节点名称
";
        sb.append(title);

        for (int i = 0; i < size; i++) {
            RunnerInfo runnerInfo = runnerInfos.get(i);
            String showTimeName = runnerInfo.getShowTime() + "    ";
            sb.append(showTimeName);

            if (i != 0) {
                RunnerInfo lastNode = runnerInfos.get(i - 1);
                long lastNodeTime = lastNode.getTime();
                long during = runnerInfo.getTime() - lastNodeTime;
                String duringStr = during + "    ";
                sb.append(duringStr);

                String rate = ZYNumberUtils.rate(during, totalTime) + "    ";
                sb.append(rate);
            } else {
                sb.append("0    ");
                sb.append("    ");
            }
            String nodeName = runnerInfo.getNodeName() + "
";
            sb.append(nodeName);
        }
        sb.append("---------------------------------------------
");
        System.out.println(sb.toString());
        clear();
    }
}

public class RunnerInfo {

    private String nodeName;

    private long time;

    private String showTime;

    public RunnerInfo(String nodeName) {
        this.nodeName = nodeName;
        Date date = new Date();
        this.time = date.getTime();
        this.showTime = ZYDateUtils.formart(date, "yyyy-MM-dd HH:mm:ss:SSS");
    }
}