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Node.js Backend Development Bootcamp · Lesson

Profiling & Memory Leak Detection

Learn how to measure CPU and memory usage in Node.js, capture profiles, and hunt down memory leaks before they crash production.

Why Profile?

You cannot optimize what you cannot measure. Profiling reveals where your app spends time (CPU) and memory, so you fix the real bottleneck instead of guessing.

A common rule: measure, change one thing, measure again.

Measuring Memory Usage

Node exposes live memory stats via process.memoryUsage(). The key field is heapUsed — the JavaScript heap your code allocates.

const m = process.memoryUsage();
console.log('Heap used MB:', (m.heapUsed / 1048576).toFixed(1));

All lessons in this course

  1. Caching Strategies for Node.js
  2. Load Balancing Your Node.js Apps
  3. Optimizing the Node.js Event Loop
  4. Profiling & Memory Leak Detection
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