Blog

Call fib(45) naively and JavaScript will make over a billion recursive calls. Call it twice and you double that. Your CPU fan kicks on, the browser tab freezes, and the function you thought was fast becomes your performance bottleneck.

Kafka is a distributed commit log, not a message queue. Segments on disk, the ISR, the KRaft controller quorum and zero-copy fetches — and how each one explains a config option you've had to set.

Most useMemo and useCallback calls in the wild accomplish nothing. Learn exactly when each hook works, why one unstable prop breaks the whole memoization chain, and when to just delete it.

From BGP Anycast routing to tiered cache hierarchies and Surrogate-Key purge — how CDNs actually move traffic from your origin to the nearest edge server.

Your Node.js server calls res.send("hello") and somewhere, 1400 bytes cross the planet in 80 milliseconds and appear correctly in a browser. That's wild. But what actually happens?

Learn how React.lazy, Suspense boundaries, and React 19 concurrent features (useTransition, useDeferredValue) eliminate bundle bloat and loading jank.