How to Improve JavaScript Performance
summary
A browser game was profiled with a 100-run benchmark using a CPU sampler and the IE UI responsiveness tool to find hotspots. Concrete optimizations included object pooling, initializing properties in constructors, using integers and typed arrays, caching DOM lookups, using requestAnimationFrame, and avoiding getters/setters; these changes reduced GC pauses, cut CPU sampling and main-loop time substantially, and kept FPS near 60 (never below 30).
AI-written summary · about
chapters (13)
- 0:00Introduction
- 3:30High Pick game origin
- 9:52High Pick game explained
- 12:31Browser performance impact
- 14:01Profiler tools
- 16:28Control memory usage
- 22:50Data types impact
- 26:52Use integers over floats
- 30:05Efficient arrays and loops
- 34:43Minimize browser calls
- 36:38Optimize animations
- 37:21Final results
- 38:46Q&A
