Performance
3 posts tagged #javascript on DiCodeWeb, from fundamentals to production, newest first.
3 postsUpdated Sep 17, 2026
Web Workers aren't magic for every slow page. This post covers when moving work to a worker pays off, what structured clone really costs, transferables, SharedArrayBuffer and COOP/COEP, a hand-written Comlink-style RPC, bundler setup, worker pools, cancellation with AbortSignal, real examples and alternatives like scheduler.yield.
A correct mental model of the browser event loop — tasks, microtasks, frames — tested with predict-the-output puzzles, then used to explain why UIs freeze and how to chunk work, yield to the main thread and move heavy work to a Web Worker.
How signals track dependencies, why push-pull gives glitch-free updates, how Solid, Preact, Angular and Vue use them, where the TC39 proposal stands, what the React Compiler changes, and the production pitfalls — with a tiny signal implementation in TypeScript.