Node.js Worker Threads: Scaling CPU-Bound Image Processing
TL;DR: Use the worker_threads module to isolate synchronous, CPU-heavy tasks like image manipulation or complex data transformations. This prevents the "Event Loop Lag" that causes API …
Resilience in Node.js: Managing Uncaught Exceptions and Promise Rejections
TL;DR: When an unhandled error occurs, the Node.js process is in an undefined state. You must log the stack trace synchronously, trigger a graceful shutdown of external resources (DBs, sockets), a…
Profiling Node.js Memory Leaks: Deep Dive into V8 Heap Analysis
TL;DR: Identify memory leaks by comparing multiple heap snapshots using Chrome DevTools or the v8 module; focus on "Retained Size" to find the root cause of ERR_WORKER_OUT_OF_MEMORY in…
Fixing FastAPI and Async SQLAlchemy Connection Pool Exhausted Errors
If you are running a high-traffic FastAPI application with an asynchronous SQLAlchemy backend, you have likely encountered the dreaded sqlalchemy.exc.TimeoutError: QueuePool limit of size 5 overflo…