Web Workers in React: Heavy Work Off Main Thread
javascript
dev.to
Heavy CPU work — parsing large binary files, sorting 50,000 records, running ML inference — belongs on a separate thread, not the main thread. The main thread has one job: keep the UI responsive. Every millisecond it spends on computation: a millisecond it cannot spend processing input events or painting frames. What Web Workers give you: JavaScript running in a separate OS thread, completely isolated from the main thread's event loop. While the worker processes data, the main thread handles cl