Category: Node.js

How to properly use worker threads, child processes, and PM2 without shooting yourself in the foot Introduction Node.js is renowned for its single-threaded, event-driven architecture. This design makes it incredibly efficient for I/O-bound operations but creates challenges for CPU-intensive tasks and utilizing multi-core systems. Enter the Cluster module – a powerful but often misunderstood tool…

A deep dive into benchmarks, plugin architecture, and real-world migration lessons from our journey to a more performant Node.js framework. Introduction When we built our first API service three years ago, Express.js was the natural choice. As the most popular Node.js framework with extensive documentation and community support, it served us well through our early…

Heap Snapshots, GC Tuning, and Fixing Leaky EventEmitters in Production Introduction Memory leaks in Node.js applications can be particularly insidious. They start small and often go unnoticed in development environments, only to manifest as catastrophic production outages under load. As a senior engineer, diagnosing and resolving these issues efficiently can be the difference between a…

Optimizations that matter (and myths that don’t) Introduction When we first announced to our engineering team that we needed to handle 1 million requests per second on our Node.js API server, we were met with skepticism. “Just migrate to Go or Rust,” some suggested. “You’ll need a cluster of at least 50 machines,” others claimed.…

A Production-Tested comparison based on Latency, Developer Experience, and Scalability Introduction As microservices architecture continues to dominate modern application development, choosing the right communication protocol becomes increasingly critical for Node.js developers. With options like REST, GraphQL, and gRPC at our disposal, making the optimal choice requires understanding each protocol’s strengths, weaknesses, and ideal use cases.…

As Node.js developers, we’ve embraced async/await as a cleaner way to handle asynchronous operations. But beneath its elegant syntax lie performance traps that can sabotage your application’s efficiency. This post reveals the hidden costs of async/await and provides battle-tested strategies to avoid them. Introduction When ECMAScript 2017 introduced async/await, it revolutionized how we handle promises…

Introduction Async/await made asynchronous code look synchronous, but beneath its clean syntax lie hidden performance traps that can cripple your Node.js applications. After debugging production outages and profiling high-throughput systems, I’ve uncovered:✅ When async/await is slower than callbacks (benchmarks included)✅ How unmanaged promises cause memory leaks✅ The secret to optimizing parallel operations Let’s expose the…

Introduction Most Node.js developers know the “Event Loop” is what makes Node.js non-blocking—but few truly understand how it orchestrates asynchronous operations under the hood. After debugging production performance issues and analyzing Libuv’s C++ source code, I’ll show you:✅ What really happens in each Event Loop phase (not just “callbacks go to the queue”)✅ How Node.js…