Posts tagged #performance

JavaScript can finally turn bytes into base64 and hex (and back) without the String.fromCharCode and btoa dance. Here's how Uint8Array's new encoding methods work and where they replace the helpers you've been copy-pasting.

ES2026's import defer evaluates a module the first time you touch its namespace, not at startup, so you can move heavy work off the cold path without turning half your call stack async.

Next.js 16.3 turned on Turbopack's persistent build cache by default and published numbers as high as 5.5x. Most CI pipelines will see exactly zero of that, because the cache is a directory and containers start empty.

Almost every laptop shipped in the last two years has a neural processing unit sitting idle. WebNN is the only web standard that can actually talk to it…

Svelte 5.36 lets you use await at the top level of a component, inside $derived, and in your markup.

Your app already runs in five tabs at once, and they all think they are in charge. The Web Locks API gives the browser a real mutex so only one of them does…

Next.js 16.3 stops firing a prefetch request for every link in the viewport and caches one reusable loading shell per route instead.

Chrome 148 ships experimental support for filling HTML placeholders out of order and streaming markup into the DOM.

React 19.2's Activity component hides a subtree instead of unmounting it, so state, scroll position, and DOM survive the round trip.