How to Improve Node.js API Performace?

Asynchronous functions are the heart of JavaScript. They perform non-blocking I/O operations, allowing the CPU to handle multiple requests simultaneously.

Efficient database queries can significantly reduce response time. Use logging to find which query takes the most time and optimize it.

Stateless APIs are common and provide JWT, OAuth, and other authentication mechanisms. These authentication tokens are kept on the client side, reducing the load on server.

Caching can handle frequent common requests, removing the need to make additional queries.

Breaking your application into smaller, self-contained modules can reduce complexity and make it easier to manage and scale.

Newer versions of Node.js generally have performance improvements and bug fixes.

A profiler can help you identify areas of your code that are causing performance bottlenecks, such as slow function calls or memory leaks.

Throttling can prevent your API from being overwhelmed by too many requests at once.

This technique can prevent a function that is likely to fail from being executed, which can improve the overall performance of your API.

HTTP/2 can provide performance benefits over HTTP, such as header compression and multiplexing.

PM2 is a production process manager for Node.js applications with a built-in load balancer. It allows you to keep applications alive forever and reload them without downtime.

This is the time it takes for the client to receive the first byte of data from the server. Reducing TTFB can improve the perceived performance of your API.

This can help to improve the performance of I/O operations.

This can help you quickly identify and fix issues.