JavaScript Performance Tools

fast HTTP/1.1 benchmarking tool written in Node.js

A benchmarking library. As used on jsPerf.com.

Low friction JavaScript benchmarks that you can share via URL

A JavaScript bundle optimizer.

Webpack plugin and CLI utility that represents bundle content as convenient interactive zoomable treemap

Calculate the real cost to run your JS app or lib to keep good performance. Show error in pull request if the cost exceeds the limit.

A tool to understand your bundle size and why files are in your bundle

A simple tool to find all external dependencies of your project.

JavaScript parser / mangler / compressor / beautifier toolkit

Extract & Inline Critical-path CSS in HTML pages

🦔 A Webpack plugin to inline your critical CSS and lazy-load the rest.

The AMP web component framework.

GPU Accelerated JavaScript

Automated auditing, performance metrics, and best practices for the web.

JavaScript Performance Monitor

Essential metrics for a healthy site.

Web performance library for measuring all performance vitals metrics

⚡️Faster subsequent page-loads by prefetching in-viewport links during idle time

Make your site’s pages instant in 1 minute and improve your conversion rate by 1%