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

sitespeed.io is an open-source tool for comprehensive web performance analysis, enabling you to test, monitor, and optimize your website’s speed using real browsers in various environments.

Collect performance metrics for your library/application.

Performance-Bookmarklet helps to analyze the current page through the Resource Timing API, Navigation Timing API and User-Timing - requests by type, domain, load times, marks and more. Sort of a light live WebPageTest.

Node Application Metrics provides a foundational infrastructure for collecting resource and performance monitoring data for Node.js-based applications.

Performance Metrics for Web Browsers

AutoWebPerf provides a flexible and scalable framework for running web performance audits with arbitrary audit tools including PageSpeedInsights, WebPageTest and more.

Run Lighthouse analysis over multiple sites in a single command

DEPRECATED - See Elastic APM instead: https://github.com/elastic/apm-agent-nodejs

An open source utility library for measuring React component render times.

Perfromance budget plugin for Webpack (https://webpack.js.org/)

NodeJS Monitoring Agent

A website for getting size of a website and letting you know how many floppies it will fit on

Google Lighthouse + Puppeteer / NPM Package

DEPRECATED StackImpact Node.js Profiler - Production-Grade Performance Profiler: CPU, memory allocations, async calls, errors, metrics, and more

Tool to run light house cron jobs on multiple urls and ship results

NextLevel is a performance metrics dashboard tailored to Next.js applications that visualizes critical data, such as build time and key web vitals, enabling developers to pinpoint inefficiencies and improve development productivity and end-user experience.

Open-source version of Boston's CityScore performance dashboard