Debugging Application Performance
summary
Systrace shows exact CPU and thread timelines so developers spot concrete regressions: extra activities add 235 ms or 166 ms to startup, service transactions cost 8–11 ms, Apache loading on Android P adds about 17 ms, large background images can cost ~50 ms, a drawer inflate eats ~42 ms, and blocking IO bursts reach 25 ms; trace points (Trace.begin/End), Catapult/traceviewer, on-device Systrace and Android Studio CPU profiler are the recommended tools to find RXJava/Retrofit lock contention and which files or libraries to optimize.
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chapters (19)
- 0:00Introduction to performance debugging
- 1:52What is Cyrace and why use it
- 3:37How to read a Cyrace trace
- 5:43Investigating app startup performance
- 7:52Analyzing the critical path
- 9:38Service transactions and delays
- 10:42Apache library removal impact
- 11:48View inflation times and trade-offs
- 13:10Drawer view inflation considerations
- 14:13Large images and startup delays
- 16:21Understanding thread states
- 18:45Blocking IO and bottlenecks
- 20:54Monitor contention in traces
- 21:58Background threads and IO contention
- 23:24Summary of Cyrace strategies
- 23:46How to capture traces for your app
- 27:15Processing and sharing traces
- 27:57Android Studio CPU profiler
- 28:43Q&A on network requests and traces
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