because of lag or some reasons, unexpected trace data will be recorded by perfetto. If we don't choose slice in measureBlock only, there maybe dirty data in metric.

refer to first screenshot, that's drag down systemui bar, and swip back to launcher trace.

some metrics don't work FrameTimingMetric doesn't work because of the way of getting frameid from slice name is wrong.
can't control what kind of datasouces which perfetto server to record. Some datasources are added by ODM, we can't add datasource to record.
lack of web application to show result of benchmark test.
there is no community to talk each other , to slove those problems.