Node.js Performance Profiling: Finding and Fixing Bottlenecks

Performance profiling helps identify bottlenecks in your Node.js applications.

CPU Profiling#

Using Chrome DevTools#

Open chrome://inspect and click "inspect" to access DevTools.

Programmatic Profiling#

Using clinic.js#

Memory Profiling#

Heap Snapshots#

Detecting Memory Leaks#

Common Memory Leaks#

Event Loop Monitoring#

Async Operations#

Optimization Techniques#

Avoid Blocking the Event Loop#

Use Worker Threads for CPU-Intensive Work#

Connection Pooling#

Monitoring in Production#

Profile regularly, monitor in production, and optimize based on real data rather than assumptions.