Optimizing and Profiling UI Performance
summary
Explains when jank happens: missed 16 ms vsync interval from double/triple buffering and buffer swaps, causing dropped frames; shows concrete wins from flattening a row from 49 views to 13 and removing redundant backgrounds to cut overdraw. Demonstrates diagnostic tools: hierarchy viewer, on-screen profile GPU rendering bars and systrace, and points to an actual costly cause — expensive bitmap uploads — with the fix of resampling images so fewer pixels flow through the pipeline.
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chapters (5)
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