web-performance

Assassin is a decentralized database that uses background threads to kill slow JavaScript.

If you're using Vercel and Google hates your site, this is for you.

The WordPress plugin for quicklink. ⚡️ Faster subsequent page-loads by prefetching in-viewport links during idle time.

PerfLint is a tool to identify unexpected performance levels of a Website

A tiny (500 bytes) CrUX API wrapper that supports record & history API, handles errors, and provides types.

Drop-in WebP, AVIF, and JPEG XL delivery for TYPO3 images — automatic, no URL or template changes

Web 性能优化系列：浏览器工作机制、性能优化、体验度量、PWA、录屏与重放

performance-budgets gives you a simple way to check and stay on top of performance

Six-tool MCP server for Google PageSpeed Insights & Chrome UX Report APIs. Analyze, compare, and optimize web performance directly through Claude, Cur...

⚡️ Magento 2 extension faster subsequent page-loads by prefetching in-viewport links during idle time.

Soak test your single page web-app (SPA) for memory leaks at high speed, with Playwright.

Lighthouse Garie plugin. Polls websites to checkout performance metrics also supports webhooks.

A collection of performance tools which allow a js developer to reliably model and monitor a webapp

High-performance waterfall photo gallery with virtualized rendering, Cloudflare Workers, and D1.

Alef Component for Modern Web Apps.

Measure Visually Complete metrics in real time

🔎 Rust TUI that finds & AI-fixes Lighthouse image issues (CLS, lazy loading, WebP, srcset) across your entire codebase in seconds.

Framework allows to perform frontend performance testing with sitespeed.io + webpagetest, view application/server metrics in real-time with Grafana.

A blazing fast server side rendering & project optimiser cli tool using Parcel (POC/Experiment)

Automate the analysis of your image dimensions, automate the generation of responsive images HTML code, test the outcome with puppeteer

Promise like module loader with automatic resolution of nested dependencies using XHR requests and localStorage caching to dynamically load modules, l...

Karma Framework for running performance tasks using Telemetry

📖 Selected and essential information on web performance collected in one place.

A collection of awesome things regarding the Climate tech ecosystem.

Imagemin meets Rollup!

It's an open-source report template that guides web professionals thought steps to audit any website in terms of the page speed and technical SEO opti...

Sharp collection of tools for front-end development, created with performance in mind. 🗡

Optimize any Joomla website and/or turn it into a Progressive Web Application

A list of Web Performance Optimization techniques, tools and resources.

A implementation of Facebook's bigpipe for the Java web platform

Enterprise-grade weather platform built with Astro and Open-Meteo. Digital Doppler features a minimalist glassmorphism interface, real-time geolocatio...

A drop-in toolbar to help visualize a website's performance.

DEPRECATED - Please use lighthouse budgets instead

Small scripts and recipes to run PageSpeed Insights via the API, save results, summarise and export to tsv.

前端 18 项数据指标性能监控，浏览器信息，错误收集上报方案，前端工程化。

A web component that lazy loads TikTok embeds. Currently experimental and a work in progress.

适用于cmd amd react jquery sass handlebars开发体系的构建工具，内置静态资源（样式、图片）内联外链、自动化雪碧图、资源to base64、资源文件注入模板、dev s...

Progressive User Experience Library

PageLab enables web performance, accessibility, SEO, etc testing at scale.

A website template for the modern web. ⭐️ Star to support our work!

The website of Guess.js

[A novel JavaScript code optimizer] A common practice in JavaScript development is to ship and deploy an application as a large file, called bundle, w...

⠿ A collection of ultra-lightweight, zero-dependency, and accessible loading spinners built entirely with Unicode Braille characters and pure CSS. Hig...

A simple tool to animate, unwind and explore WebPagetest filmstrips

Imager for JavaScript (NodeJS) - Site performance tools for efficiently distributing media on the web.

A react library providing components that help with interaction-based asset pre-fetching. Demo -

A simple sitespeed.io lighthouse plugin to collect few performance metrics

An Awwwards-inspired online converter tool to minify, beautify, denest, and nest CSS code according to the latest CSS specs. Built with zero framework...

Curated links about Web Performance, used in the Perf Links section of WebPerformance Report.

A webpack boilerplate aiming to improve web performance.