Let the Main Thread Breathe!
summary
Browsers hit a 16.6ms budget for 60fps so heavy sync work shows janky frames; about 90% of new users are mobile so low‑end devices matter. The concrete claim: move blocking logic (reducers, big sorts) off the main thread using WebWorker and Comlink to proxy calls, or compile hot code to WebAssembly for speed. Demo moves a Redux‑style reducer/store into a worker, keeps UI responsive, and shows reduced jank though worker startup adds overhead.
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chapters (6)
- 0:00Introduction
- 3:47Main thread struggles on mobile
- 7:22Web workers free main thread
- 11:17Redux logic in worker
- 15:49Performance impact of workers
- 16:52WebAssembly as alternative
