Measuring Jank and Startup with Macrobenchmark
summary
Jetpack Macrobenchmark is a concrete tool that measures startup and frame timing, not vague advice: it measures cold warm and hot startup, runs repeated iterations while captures systrace per iteration to pinpoint slow frames, and stores results and traces so regressions are reproducible — including outputs JSON for CI and Studio links to inspect the trace. Example shows a mispackaged JPEG causing one slow icon and a quick fix that materially reduces jank.
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chapters (9)
- 0:00Intro
- 0:27Definitions
- 1:02Why measuring performance is important
- 2:06Problems with measuring performance
- 2:23Testing app performance
- 2:50Jetpack benchmark library
- 3:22Macrobenchmark
- 5:36How does it work
- 9:11Trace Points
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