by alexander-opalic
Vue already syncs your refs to the DOM. Sync engines extend that same idea to databases — keeping client state and server state in harmony. Here's how Replicache, Zero, Convex, PowerSync, LiveStore, Jazz, and Dexie each approach this differently.
by malte-ubl
Vercel built fast-webstreams, a spec-compliant drop-in replacement for WHATWG Streams that achieves 3-14x throughput improvements by eliminating per-read Promise allocations and routing pipeline chains through Node.js internals.
by johnson-chu
The fastest JavaScript reactive system achieves its performance through linked-list subscriptions, JIT-friendly monomorphic functions, iterative DFS propagation, and aggressive dependency-list reuse—not clever algorithms but relentless micro-optimization.
by david-fant
You can extract and reconstruct any React component from a production website by leveraging React Fiber's internal tree structure combined with LLMs.
by shu-ding, andrew-qu
Performance problems compound over time, so optimization work should follow a strict priority order: eliminate waterfalls first, reduce bundle size second, then progressively address server-side, client-side, and re-render issues.
by antonio-erdeljac
A complete project walkthrough for building a Cursor-like AI code editor using Next.js 16, React, and Convex as the backend—demonstrating how to combine modern web technologies with AI capabilities.
by tkdodo
Compound components work best for flexible layouts, not dynamic data or fixed structures. A factory function pattern solves the type safety problem without sacrificing flexibility.
by aaron-boodman
Query-driven sync turns out to be the key to general-purpose sync engines — and the trick that makes it work at interactive speeds is a novel IVM approach (ZVM) that pulls sorted data through operator pipelines instead of pushing everything.