JavaScript (Node.js) Application Performance

In modern web development, backend performance is not just a nice addition, but a critical success factor. Slow APIs, memory leaks, and inefficient use of server resources lead to user loss and increased infrastructure costs. The book "JavaScript (Node.js) Application Performance" is a practical guide that will help you transform your Node.js application from merely functional to lightning-fast and reliable.

The author, Alexey Voronov, a senior developer with 10 years of experience in JavaScript, thoroughly examines the internal workings of the V8 engine, garbage collection mechanisms, and the Event Loop. You will learn how Node.js handles requests, where bottlenecks occur, and how to eliminate them using modern profiling tools.

What you will learn from this book:

• Profiling basics: Chrome DevTools, clinic.js, 0x, and the built-in Node.js profiler.
• How to find and fix memory leaks using heap snapshots and allocation sampling.
• Optimizing asynchronous code: proper use of async/await, Promises, and Streams.
• Reducing API response time through caching, connection pooling, and database query optimization.
• Scaling applications: clustering, worker threads, and load balancing.
• Writing benchmarks and load testing with autocannon and k6.
• Optimizing file system operations, network requests, and heavy computations.

Who this book is for:

• Node.js Backend Developers who want to improve the performance of their services.
• Team Leads and Architects responsible for scaling and stability of production systems.
• Full-stack Developers looking to gain a deeper understanding of the platform's internals.
• DevOps Engineers involved in monitoring and configuring Node.js applications.

The book contains numerous real-world examples, ready-to-use code snippets, and checklists for performance auditing. You will learn not just to write fast code, but to approach optimization systematically: from analyzing metrics to implementing changes in a production environment.

"JavaScript (Node.js) Application Performance" is an essential reference for anyone who wants their server to withstand high loads and run without failures. Make your code faster today!