6 articles found
JavaScript runs on a single thread, and the moment you throw something heavy at it, the whole page locks up. Web Workers give you actual background threads that run in parallel with the main thread. Here is how to use dedicated workers, shared workers, transferable objects, and worker pools — with real examples like image processing and large file parsing.
I burned a lot of hours on cache invalidation before I figured out which Redis patterns actually hold up under load. Here's what I settled on after running caching in production across several Node.js services.
Database indexes are one of the most powerful tools for optimizing query performance. Learn how B-tree indexes, hash indexes, composite indexes, and more work under the hood, and discover strategies for indexing in both PostgreSQL and MongoDB.
I've been asked about the event loop more than any other Node.js topic. Here's how I finally made sense of it -- why Node can juggle thousands of connections on one thread, and the mistakes I kept making that blocked it.
React Server Components represent a fundamental shift in how we build React applications, allowing components to render exclusively on the server. Learn how RSC work, when to use server vs client components, and how they integrate with Next.js App Router for optimal performance.
Most React performance advice sounds great in a blog post and falls apart in a real codebase. I've spent years profiling production apps, and the bottlenecks are almost never where you'd guess. Here's what actually matters -- from the memo traps everyone falls into, to the virtualization wins that saved our dashboards, to the React 18 concurrent features that changed how I think about responsiveness.