web-performance

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.

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

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

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

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

Alef Component for Modern Web Apps.

Measure Visually Complete metrics in real time

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

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

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.

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.

Progressive User Experience Library

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...

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

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

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

A webpack boilerplate aiming to improve web performance.

ImageOptim HTTP API interface for Node.js®

Improve load performance by inlining and optimising remote assets loaded through CDN

AI-powered SEO and CRO auditing platform with automated technical checks, content analysis, UX insights, and smart reporting.

🦃 Black Friday Performance Testing Experiment 🙏

Slides and demo for PerfJankie/BrowserPerf

MPA-First Development Mandate | Guiding principles for building performant, resilient Multi-Page Applications. Focus on native web platform strengths,...

The fastest Node framework on this 🌎 🚀 🚀 🚀

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

Lightweight and framework-agnostic PHP library to calculate web page carbon emissions based on real-time parameters. No external API required — ideal...

Pagespeed Monitoring - A simple tool to monitor Front-End regression using Google Pagespeed Insight and Regular Expressions.

:tv: :tv: Side by side video playing for webpagetest / browsertime recordings.