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.

displays the import size of the package you are importing inside the code editor

Clear Eyes. Full Hearts. Can’t Lose.

Performance Metrics for Web Browsers

⚡Metrics to help understand page speed and user experience

List of performance analysis, monitoring and optimization tools

Checking browser rendering performance regression

Curated resources that help you build lightning fast websites

前端性能指标的监控,采集以及上报。用于测量第一个dom生成的时间(FP/FCP/LCP)、用户最早可操作时间（fid|tti）和组件的生命周期性能,，网络状况以及资源大小等等。向监控后台报告实际用户测量值。

Compare HAR files.

E2E test framework to check for performance regressions in Angular apps

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

HTML5 Slide Deck Generator Tool Based on the PageSpeed Insights API

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

Notes about Android development patterns. #BuildBetterApps #PERFMATTERS

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

Slides and demo for PerfJankie/BrowserPerf

Nsk Google Developer Group webperf tools talk links, snippets and stuff

🔀 RouteKit is a set of tools for generating efficient routers.

Voronezh webperf tools talk links, snippets and stuff