Node.js is single-threaded by design, so a heavy CPU-bound task can freeze your entire event loop. Here's how to use worker_threads to offload real work without blocking requests.
React Server Components change where your components run and what they're allowed to do. Here's a practical guide to deciding when to reach for 'use client' and when to leave a component on the server.
asyncio speeds up I/O-bound Python code dramatically — and does nothing for CPU-bound code. Here's how to tell the difference and write async code that's actually correct.
Memory leaks silently degrade long-running Node.js servers until they crash under load. Here's how to detect, diagnose, and fix them using built-in tools and proven patterns.