hugegraph-common/src/main/java/org/apache/hugegraph/perf/LightStopwatch.java [143:171]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
        } catch (CloneNotSupportedException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public Stopwatch child(String name) {
        return this.children.get(name);
    }

    @Override
    public Stopwatch child(String name, Stopwatch watch) {
        if (watch == null) {
            return this.children.remove(name);
        }
        return this.children.put(name, watch);
    }

    @Override
    public boolean empty() {
        return this.children.size() == 0;
    }

    @Override
    public void clear() {
        this.lastStartTime = -1L;

        this.times = 0L;
        this.totalCost = 0L;
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



hugegraph-common/src/main/java/org/apache/hugegraph/perf/NormalStopwatch.java [194:222]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
        } catch (CloneNotSupportedException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public Stopwatch child(String name) {
        return this.children.get(name);
    }

    @Override
    public Stopwatch child(String name, Stopwatch watch) {
        if (watch == null) {
            return this.children.remove(name);
        }
        return this.children.put(name, watch);
    }

    @Override
    public boolean empty() {
        return this.children.size() == 0;
    }

    @Override
    public void clear() {
        this.lastStartTime = -1L;

        this.times = 0L;
        this.totalCost = 0L;
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -