Unblocking The Main Thread: Solving ANRS and Frozen Frames
summary
Defines slow render as >60 ms, frozen frame as >700 ms and ANR as >5 s and shows concrete fixes: replace heavy vectors with WebP and async image loading via Coil, consolidate encrypted SharedPreferences because each instance costs ≈300 ms, share thread pools to cut thread count from 180 to 130, use coroutines with well placed dispatcher switches, run LeakCanary and LeakCanary Plumber to find framework leaks, enable R8 which yields ~25% faster hotspots and add baseline profiles for ~30% startup gains.
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chapters (12)
- 0:00Introduction
- 3:39Slow rendering and frozen frames
- 8:20Memory pressure and GC
- 11:12Memory leaks and lifecycle
- 16:05Threading solutions and pools
- 21:10Code optimization with R8
- 23:37Image loading and vector drawables
- 25:23Dependency injection pitfalls
- 32:09Play Store reports and profiles
- 35:01Performance measurement and ANRs
- 37:11Performance optimization retrospective
- 38:57Q&A
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