Lightweight JavaScript library that predicts user intent based on mouse mov...

Browser-based JavaScript benchmarking tool.

hack into react internals

A library to inline your app's critical CSS and lazy-load the rest.

Scan for React performance issues and eliminate slow renders in your app

Benchmark tooling that loves you

Performance testing companion for React and React Native

Optimizes static websites for best user experience and best Core Web Vitals...

A tool for finding memory leaks in web apps

A framework for finding JavaScript memory leaks and analyzing heap snapshot...

A simple, tiny and lightweight benchmarking library!

A fast, interactive web-based viewer for performance profiles.

Monkey patches React to notify you about avoidable re-renders.

Calculate the real cost to run your JS app or lib to keep good performance....

Essential metrics for a healthy site.

Web performance library for measuring all performance vitals metrics

GPU Accelerated JavaScript

Node.js tool for optimizing SVG files

A benchmarking library. As used on jsPerf.com.

The only Front-End Performance Checklist that runs faster than the others

High-resolution JavaScript timer based on performance.mark/measure (491 byt...

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

JavaScript Performance Monitor

Extract & Inline Critical-path CSS in HTML pages