Live: Debugging Recycler View Performance using Systrace/Perfetto
summary
Live debugging shows concrete fixes and numbers not buzzwords: capture traces with Systrace/Perfetto and custom Trace.beginSection markers, find that onBindViewHolder takes 511 ms on bad cases, replace a costly HorizontalScrollView with a proper RecyclerView and measured slow Material Chip inflation (about 4 ms dropping to ~1 ms after swapping to a styled TextView). The process highlights exact hot methods, microsecond/millisecond timing, and validated improvements end-to-end rather than vague examples.
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chapters (9)
- 0:00Start
- 1:59Skipped Frames
- 3:55Developer Options
- 6:05Visual Code Inspection
- 6:30Items Adapter
- 8:35System Traces
- 18:09Recap
- 26:46Validate Our Optimizations
- 30:11Sources of Slow Recycler Views
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