A curated list of Web Performance Optimization. Everyone can contribute
      here!
    
    Books
    
    Case studies
    
      - 
        WPOStats - Case studies and
        experiments demonstrating the impact of web performance optimization
        (WPO) on user experience and business metrics.
      
 
    
    Documentation
    
      - 
        Browser Diet - A collaborative
        guide about frontend performance.
      
 
      - 
        PageSpeed Insights Rules
        - A guide created by PageSpeed Team. Deprecated. This is deprecated and
        will be shut down in May 2019. Version 5 is the latest and provides both
        real-world data from the Chrome User Experience Report and lab data from
        Lighthouse.
      
 
      - 
        Best Practices for Speeding Up Your site
        - The list includes 35 best practices divided into 7 categories, created
        by Yahoo! Exceptional Performance team.
      
 
    
    Events
    Conferences
    
      - 
        Velocity – At
        Velocity, web operations, performance, and DevOps professionals learn to
        build fast, resilient, and highly available sites and apps.
      
 
    
    
    Analyzers
    
      - 
        Web.dev - Get the web’s modern
        capabilities on your own sites and apps with useful guidance and
        analysis from web.dev.
      
 
      - 
        Confess - Uses
        PhantomJS to headlessly analyze web pages and generate manifests.
      
 
      - 
        DebugBear - DebugBear is a site
        monitoring tool based on Lighthouse. See how your scores and metrics
        changed over time, with a focus on understanding what caused each
        change. DebugBear is a paid product with a free 30-day trial.
      
 
      - 
        Page Speed
        - The PageSpeed family of tools is designed to help you optimize the
        performance of your site. PageSpeed Insights products will help you
        identify performance best practices that can be applied to your site,
        and PageSpeed optimization tools can help you automate the process.
      
 
      - 
        Lighthouse -
        Auditing and performance metrics tool for Progressive Web Applications.
      
 
      - 
        YSlow - YSlow
        analyzes web pages and suggests ways to improve their performance based
        on a set of rules for high performance web pages.
      
 
      - 
        YSlow for PhantomJS - YSlow
        for PhantomJS also introduces new output formats for automated test
        frameworks: TAP (Test Anything Protocol) and JUnit.
      
 
      - 
        Grunt-WebPageTest -
        Grunt plugin for continuously measurement of WebPageTest. (Demo)
      
 
      - 
        Grunt-yslow -
        Grunt task for testing page performance using PhantomJS, a headless
        WebKit browser.
      
 
      - 
        Grunt-perfbudget
        - A Grunt.js task for enforcing a performance budget (more on performance budgets).
      
 
      - 
        Web Tracing Framework
        - Web Tracing Framework is a set of libraries, tools, and visualizers
        for the tracing and investigation of complex web applications
      
 
      - 
        Yandex.Tank - An
        extensible open source load testing tool for advanced linux users which
        is especially good as a part of an automated load testing suite.
      
 
      - 
        Yellow Lab Tools - Online quick and
        easy tool that audits frontend bad practices, reveals performance issues
        and profiles JavaScript.
      
 
      - 
        Pagelocity - A web performance
        optimization and analysis tool.
      
 
      - 
        Varvy - Test your site to see
        if it follows the Google guidelines for speed.
      
 
      - 
        Web Bloat Score Calculator -
        Compare size of a page to a compressed image of the same page
      
 
      - 
        Speed Racer -
        Collect performance metrics for your library/application using Chrome
        headless.
      
 
      - 
        Speedrank - Speedrank monitors the
        performance of your site in the background. It displays Lighthouse
        reports over time and delivers recommendations for improvement.
        Speedrank is a paid product with 14-day-trial.
      
 
    
    Analyzers - API
    
      - 
        Node-yslowjs -
        YSlow.js on Node.js is a simple Node.js wrapper for programmatically
        running phantomjs yslow.js.
      
 
      - 
        PSI - PageSpeed Insights
        for Node.js - with reporting.
      
 
    
    Bundle Analyzer
    
      - 
        Bundlesize -
        Keep your bundle size in check.
      
 
      - 
        source-map-explorer
        - Analyze and debug bundle space usage through source maps.
      
 
      - 
        Bundlephobia - Helps you find
        the performance impact of adding an npm package to your frontend bundle.
      
 
      - 
        Webpack bundle analyzer
        - webpack plugin and CLI utility that represents bundle content as
        convenient interactive zoomable treemap.
      
 
      - 
        Disc - Visualise the module tree of
        browserify project bundles and track down bloat.
      
 
      - 
        Lasso-analyzer
        - analyze and Visualise project bundles created by Lasso.
      
 
      - 
        Packtracker.io - Check your webpack
        bundle stats on every pull request, and track them over time.
      
 
      - 
        Compression webpack plugin
        - Prepare compressed versions of assets to serve them with
        Content-Encoding.
      
 
    
    Benchmark - CSS
    
      - 
        CSS-perf - Completely
        unscientific way of testing CSS performance. Most of these tests will
        revolve around methodologies and techniques for determining effective
        CSS architecture. Put another way, I want to know what works best given
        a particular comparison of CSS strategies.
      
 
    
    Benchmark - JavaScript
    
      
        A set of tools for creating test cases and compare different
        implementations in JavaScript.
      
    
    
      - 
        JSPerf - jsPerf aims to provide an easy
        way to create and share test cases, comparing the performance of
        different JavaScript snippets by running benchmarks.
      
 
      - 
        Benchmark.js - A robust
        benchmarking library that works on nearly all JavaScript platforms,
        supports high-resolution timers, and returns statistically significant
        results.
      
 
      - 
        JSlitmus - JSLitmus is
        a lightweight tool for creating ad-hoc JavaScript benchmark tests.
      
 
      - 
        Matcha - Matcha
        allow you to design experiments that will measure the performance of
        your code. It is recommended that each bench focus on a specific point
        of impact in your application.
      
 
      - 
        Timing.js -
        Timing.js is a small set of helpers for working with the Navigation
        Timing API to identify where your application is spending its time.
        Useful as a standalone script, DevTools Snippet or bookmarklet.
      
 
      - 
        Stats.js - This class
        provides a simple info box that will help you monitor your code
        performance.
      
 
      - 
        PerfTests -
        Performance tests of JavaScript inheritance models.
      
 
      - 
        Memory-stats.js
        - minimal monitor for JS Heap Size via performance memory.
      
 
    
    Benchmark - PHP
    
      - 
        PHPench - PHPench creates a
        graphical output for a PHP benchmark. Plot the runtime of any function
        in realtime with GnuPlot and create an image out of the result.
      
 
      - 
        php-bench -
        Benchmark and profile PHP code blocks whilst measuring the performance
        footprint.
      
 
    
    Bookmarklets
    
      - 
        Yahoo YSlow for Mobile/Bookmarklet
        - YSlow analyzes web pages and suggests ways to improve their
        performance based on a set of rules for high performance web pages.
      
 
      - 
        PerfMap - A bookmarklet
        to create a frontend performance heatmap of resources loaded in the
        browser using the Resource Timing API.
      
 
      - 
        DOM Monster - A
        cross-platform, cross-browser bookmarklet that will analyze the DOM
        & other features of the page you’re on, and give you its bill of
        health.
      
 
      - 
        CSS Stress
        - CSS Stress is a Testing and Performance Profiling.
      
 
      - 
        Performance-Bookmarklet
        - Analyze the current page through the Resource Timing API, Navigation
        Timing API and User-Timing - Sort of a light live WebPageTest. As
        Chrome Extension
        and
        Firefox Add-on
        under the name Performance-Analyser.
      
 
    
    CDN
    
      
        A content delivery network or content distribution network (CDN) is a
        large distributed system of servers deployed in multiple data centers
        across the Internet. The goal of a CDN is to serve content to end-users
        with high availability and high performance. See a large list of CDN in
        Wikipedia.
      
    
    
      - 
        Cloudflare CDN - A content
        delivery network that uses next-gen tech to deliver a fast, reliable,
        CDN services
      
 
      - 
        PageCDN - A state of the art
        opensource CDN with aggressive content optimization using brotli-11
        compression, HTTP/2 server push, better HTTP/2 multiplexing, and more.
        Supports 100s of libraries and 2000+ WordPress themes already. Easy to
        use, easy to link and very fast.
      
 
      - 
        jsDelivr - Similar to
        Google Hosted Libraries, jsDelivr is an open source CDN that allows
        developers to host their own projects and anyone to link to our hosted
        files on their sites.
      
 
      - 
        Google Hosted Libraries
        - Google Hosted Libraries is a content distribution network for the most
        popular, open-source JavaScript libraries.
      
 
      - 
        CDNjs - An open source CDN for
        JavaScript and CSS sponsored by CloudFlare that hosts everything from
        jQuery and Modernizr to Bootstrap.
      
 
      - 
        jQuery - jQuery CDN – Latest
        Stable Versions, powered by MaxCDN.
      
 
      - 
        :cn: UpYun CDN - CDN provided by
        upyun.
      
 
      - 
        :cn:
        Bootstrap 中文网开放 CDN 服务 -
        Bootstrap Chinese net open CDN service (only HTTP).
      
 
      - 
        :ru: Yandex CDN - Yandex
        Content Delivery Network hosts popular third party JavaScript and CSS
        libraries (best for use in Russia).
      
 
    
    
      
        To find useful more information for you make the right choice between
        paid CDNs, please visit
        CDNPlanet.
      
    
    CDN - Monitor
    
      - 
        CDNperf - finds you fast and
        reliable JavaScript CDNs that make your sites snappy and happy.
      
 
    
    CDN - Utilities
    
      - 
        Cdnex - Prepends asset
        URLs with custom CDN URLs.
      
 
      - 
        Gulp-google-cdn
        - Replaces script references with Google CDN ones.
      
 
    
    Extensions
    
    Image Optimizers
    
      
        How to remove all this unnecessary data and give you a file without
        degrading quality.
      
    
    
      - 
        Grunt-smushit -
        Grunt plugin to remove unnecessary bytes of PNG and JPG using Yahoo
        Smushit.
      
 
      - 
        Gulp-smushit - Gulp
        plugin to optimize PNG and JPG using Yahoo Smushit. Made on top of
        smosh.
      
 
      - 
        Smush it - Smush it uses
        optimization techniques specific to image format to remove unnecessary
        bytes from image files. It is a “lossless” tool, which means it
        optimizes the images without changing their look or visual quality.
      
 
      - 
        Imagemin - Minify
        images seamlessly with Node.js.
      
 
      - 
        Sharp - The typical use
        case for this high speed Node.js module is to convert large images of
        many formats to smaller, web-friendly JPEG, PNG and WebP images of
        varying dimensions.
      
 
      - 
        Gm - GraphicsMagick and
        ImageMagick for Node.js.
      
 
      - 
        Exexif - Pure
        elixir library to extract tiff and exif metadata from JPEG files.
      
 
      - 
        ExifCleaner - GUI app to remove
        exif metadata from images and video files with drag and drop. Free and
        open source.
      
 
      - 
        OptiPNG - OptiPNG is a PNG
        optimizer that recompresses image files to a smaller size, without
        losing any information.
      
 
      - 
        Grunt-contrib-imagemin
        - Minify PNG and JPEG images for Grunt.
      
 
      - 
        Gulp-imagemin
        - Minify PNG, JPEG, GIF and SVG images with imagemin for Gulp.
      
 
      - 
        Grunt-WebP -
        Convert your images to WebP format.
      
 
      - 
        Gulp-WebP -
        Convert images to WebP for Gulp.
      
 
      - 
        Imageoptim - Free app that makes
        images take up less disk space and load faster, without sacrificing
        quality. It optimizes compression parameters, removes junk metadata and
        unnecessary color profiles.
      
 
      - 
        Grunt-imageoptim
        - Make ImageOptim, ImageAlpha and JPEGmini part of your automated build
        process.
      
 
      - 
        ImageOptim-CLI
        - Automates ImageOptim, ImageAlpha, and JPEGmini for Mac to make batch
        optimization of images part of your automated build process.
      
 
      - 
        Tapnesh-CLI -
        Tapnesh is a CLI tool that will optimize all your images in parallel
        easily and efficiently!
      
 
      - 
        Tinypng - Advanced lossy compression
        for PNG images that preserves full alpha transparency.
      
 
      - 
        Kraken Web-interface -
        Optimize your images and will be available for download for 12 hours.
      
 
      - 
        Compressor - Online image
        compressor for JPG, PNG, SVG and GIF.
      
 
      - 
        Shrinkray - One-click optimization
        for images in your GitHub repos
      
 
      - 
        mozjpeg - Improved JPEG
        encoder.
      
 
      - 
        Jpegoptim - Utility to
        optimize/compress JPEG files.
      
 
      - 
        ZopfliPNG - A
        command-line program to optimize PNG images.
      
 
      - 
        AdvPNG -
        Recompress PNG files to get the smallest possible size.
      
 
      - 
        Leanify - Lightweight
        lossless file minifier/optimizer.
      
 
      - 
        Trimage - A cross-platform tool for
        losslessly optimizing PNG and JPG files.
      
 
      - 
        ImageEngine - Cloud service for
        optimizing, resizing and caching images on the fly with great mobile
        support.
      
 
      - 
        ImageKit.io - Intelligent real-time
        image optimizations, image transformations with a global delivery
        network and storage.
      
 
    
    Lazyloaders
    
      - 
        lazyload - Lazyload
        images, iframes, widgets with a standalone JavaScript lazyloader ~1kb
      
 
      - 
        lozad.js - Highly
        performant, light ~0.9kb and configurable lazy loader in pure JS with no
        dependencies for responsive images, iframes and more
      
 
    
    Loaders
    
      - 
        HeadJS- The only script
        in your HEAD. for Responsive Design, Feature Detections, and Resource
        Loading.
      
 
      - 
        RequireJS - RequireJS is a
        JavaScript file and module loader. It is optimized for in-browser use,
        but it can be used in other JavaScript environments, like Rhino and
        Node.js.
      
 
      - 
        Labjs - is an open-source (MIT license)
        project supported by Getify Solutions. The core purpose of LABjs is to
        be an all-purpose, on-demand JavaScript loader, capable of loading any
        JavaScript resource, from any location, into any page, at any time.
      
 
      - 
        Defer.js - Async
        Everything: Make the meat of your pages load faster with this JS morsel.
      
 
      - 
        InstantClick -
        InstantClick makes following links in your site instant.
      
 
      - 
        JIT - A JIT (Just
        In Time) plugin loader for Grunt. Load time of Grunt does not slow down
        even if there are many plugins.
      
 
    
    Metrics Monitor
    
      - 
        Phantomas -
        PhantomJS-based web performance metrics collector and monitoring tool.
      
 
      - 
        Showslow - open source tool that
        helps monitor various site performance metrics over time. It captures
        the results of YSlow, Page Speed Insights, WebPageTest and dynaTrace
        Ajax Edition.
      
 
      - 
        Bench - Using Phantomas
        (a PhantomJS backed client performance metrics scrapper). Benchmark a
        page, store results in MongoDB and display result via the built-in
        server.
      
 
      - 
        Keepfast - Tool to
        monitor indicators related to performance of a web page.
      
 
      - 
        GTmetrix - GTmetrix uses Google Page
        Speed and Yahoo! YSlow to grade your site’s performance and provides
        actionable recommendations to fix these issues.
      
 
      - 
        Pingbreak.com - Free site and SSL
        Monitoring with response time alerting (on Slack, Twitter, Mattermost,
        Discord or custom Webhook).
      
 
      - 
        Pingdom site Speed Test -
        Test the load time of that page, analyze it and find bottlenecks.
      
 
      - 
        Dotcom-tools
        - analyze your website’s speed in real browsers from 20 locations
        worldwide.
      
 
      - 
        WebPageTest - Run a free site
        speed test from multiple locations around the globe using real browsers
        (IE and Chrome) and at real consumer connection speeds. You can run
        simple tests or perform advanced testing including multi-step
        transactions, video capture, content blocking and much more. Your
        results will provide rich diagnostic information including resource
        loading waterfall charts, Page Speed optimization checks and suggestions
        for improvements.
      
 
      - 
        Sitespeed.io -
        Sitespeed.io is an open source tool that will check your site against
        web performance best practice rules and use the Navigation Timing API to
        collect metrics. It will create XML & HTML output of the result.
      
 
      - 
        Grunt-phantomas
        - Grunt plugin wrapping phantomas to measure frontend performance.
      
 
      - 
        Perfjankie -
        Runtime Browser Performance regression suite (Demo).
      
 
      - 
        BrowserView Monitoring
        - Continually checks web page load times in Internet Explorer, Chrome
        and Firefox from multiple points around the world.
      
 
      - 
        New Relic Browser Monitoring
        - Monitor your browser-side applications in real time, with a focus on
        real end users’ experiences.
      
 
      - 
        DareBoost - Real Browser
        Monitoring. Offers complete reports about web performance and quality
        using YSlow, Page Speed and numerous custom tips.
      
 
    
    Metrics Monitor - API
    
    Minifiers - HTML
    
      - 
        HTMLCompressor -
        HtmlCompressor is a small, fast and very easy to use Java library that
        minifies given HTML or XML source by removing extra whitespaces,
        comments and other unneeded characters without breaking the content
        structure. As a result page become smaller in size and load faster. A
        command-line version of the compressor is also available.
      
 
      - 
        Django-htmlmin
        - django-html in an HTML minifier for Python with full support for HTML
        5. It supports Django, Flask and any other Python web framework. It also
        provides a command-line tool that can be used for static sites or
        deployment scripts.
      
 
      - 
        HTMLMinifier -
        HTMLMinifier is a highly configurable, well-tested, Javascript-based
        HTML minifier, with lint-like capabilities.
      
 
      - 
        Grunt-contrib-htmlmin
        - A grunt plugin to minify HTML that uses HTMLMinifier.
      
 
      - 
        Gulp-htmlmin
        - A gulp plugin to minify HTML that uses HTMLMinifier.
      
 
      - 
        Grunt-htmlcompressor
        - Grunt plugin for HTML compression, using htmlcompressor.
      
 
      - 
        HTML_minifier
        - Ruby wrapper for kangax html-minifier.
      
 
      - 
        HTML_press -
        Ruby gem for compressing html, that removes all whitespace junk, and
        leaves only HTML.
      
 
      - 
        Koa HTML Minifier -
        Middleware that minifies your HTML responses using html-minifier. It
        uses html-minifier’s default options which are all turned off by
        default, so you have to set the options otherwise it’s not going to do
        anything.
      
 
      - 
        HTML Minifier Online
        - A HTML min tool by kangax (HTMLMinifier Creator).
      
 
      - 
        Minimize - Minimize is
        a HTML minifier based on the node-htmlparser,currently, HTML minifier is
        only usable server-side. Client-side minification will be added in a
        future release.
      
 
      - 
        Html-minifier -
        A simple Windows command-line tool to minify your HTML, Razor views
        & Web Forms views
      
 
    
    Minifiers - JS & CSS
    
      - 
        YUI Compressor -
        JavaScript compressor which, in addition to removing comments and
        white-spaces, obfuscates local variables using the smallest possible
        variable name. This obfuscation is safe, even when using constructs such
        as ‘eval’ or ‘with’ (although the compression is not optimal is those
        cases) Compared to jsmin, the average savings is around 20%.
      
 
      - 
        UglifyJS2 - UglifyJS
        is a JavaScript parser, minifier, compressor or beautifier toolkit,
        written in JavaScript.
      
 
      - 
        CSSO - CSS minimizer unlike
        others. In addition to usual minification techniques it can perform
        structural optimization of CSS files, resulting in smaller file size
        compared to other minifiers.
      
 
      - 
        CSSmin.js
        - cssmin.js is a JavaScript port of YUICompressor’s CSS minifier.
      
 
      - 
        Grunt-contrib-concat
        - A Grunt plugin to concatenate files.
      
 
      - 
        Grunt-contrib-uglify
        - A Grunt plugin to concatenate and minify JavaScript files.
      
 
      - 
        Clean-css - A
        fast, efficient, and well tested CSS minifier for node.js.
      
 
      - 
        Django-compressor
        - Compresses linked and inline JavaScript or CSS into a single cached
        file.
      
 
      - 
        Django-pipeline
        - Pipeline is an asset packaging library for Django, providing both CSS
        and JavaScript concatenation and compression, built-in JavaScript
        template support, and optional data-URI image and font embedding.
      
 
      - 
        JShrink - JShrink is a
        PHP class that minifies JavaScript so that it can be delivered to the
        client quicker.
      
 
      - 
        JSCompress - The most minimalistic
        online JS Compress tool.
      
 
      - 
        CSSshrink - Because
        CSS is ospon the critical path to rendering pages. It must be small! Or
        else!
      
 
      - 
        Grunt-cssshrink
        - This is just a grunt wrapper for CSS Shrink.
      
 
      - 
        Gulp-cssshrink
        - Shrinks CSS files using cssshrink for Gulp.
      
 
      - 
        Prettyugly - Uglify
        (strip spaces) or prettify (add consistent spaces) CSS code.
      
 
      - 
        Grunt-contrib-cssmin
        - CSS Minifier for Grunt.
      
 
      - 
        Grunt-uncss - A
        grunt task for removing unused CSS from your projects.
      
 
      - 
        Gulp-uncss - A gulp
        task for removing unused CSS from your projects.
      
 
    
    Miscellaneous
    
      - 
        Socialite.js - Socialite provides
        a very easy way to implement and activate a plethora of social sharing
        buttons — any time you wish. On document load, on article hover, on any
        event.
      
 
      - 
        uCSS - uCSS is made for
        crawling (large) sites to find unused CSS selectors, but not remove
        unused CSS.
      
 
      - 
        HTTPinvoke- A
        no-dependencies HTTP client library for browsers and Node.js with a
        promise-based or Node.js-style callback-based API to progress events,
        text and binary file upload and download, partial response body, request
        and response headers, status code.
      
 
      - 
        Critical - Extract
        & Inline Critical-path CSS in HTML pages (alpha).
      
 
      - 
        Csscolormin -
        Utility that minifies CSS colors, example: min(“white”); // minifies to
        “#fff”.
      
 
      - 
        Lazysizes - High
        performance lazy loader for images (responsive and normal), iframes and
        scripts, that detects any visibility changes triggered through user
        interaction, CSS or JavaScript without configuration.
      
 
      - 
        Perf-Tooling - Perf Tooling is
        a shared resource to keep track of new and existent performance tools.
      
 
      - 
        TMI - TMI (Too Many
        Images) - discover your image weight on the web.
      
 
    
    Generators
    
      - 
        Glue - Glue is a
        simple command-line tool to generate sprites:
      
 
      - 
        Pitomba-spriter -
        Spriter is a simple and flexible dynamic sprite generator for CSS, using
        Python. It can process CSS both synchronous and asynchronous as it
        provides classes to be used in your python code and also a watcher that
        listens to your filesystem and changes CSS and sprite as soon as a
        static is changed.
      
 
      - 
        Grunt-spritesmith
        - Grunt task for converting a set of images into a spritesheet and
        corresponding CSS variables.
      
 
      - 
        Grunt-sprite-css-replace
        - Grunt task that generates a sprite from images referenced in a style
        sheet and then updates the references with the new sprite image and
        positions.
      
 
      - 
        Grunt-svg-sprite
        - SVG sprites & stacks galore — Grunt plugin wrapping around
        svg-sprite that reads in a bunch of SVG files, optimizes them and
        creates SVG sprites and CSS resources in various flavours.
      
 
      - 
        Gulp-sprite - gulp
        task for creating an image sprite and the corresponding style sheets for
        Gulp.
      
 
      - 
        Gulp-svg-sprites
        - gulp task for creating svg sprites.
      
 
      - 
        SvgToCSS - Optimizes and
        renders SVG files in CSS / Sass sprites.
      
 
      - 
        Assetgraph-sprite
        - Assetgraph transform for auto generating sprites based on the CSS
        dependency graph.
      
 
      - 
        Sprite Cow - Sprite Cow helps
        you get the background-position, width and height of sprites within a
        spritesheet as a nice bit of copyable CSS.
      
 
      - 
        Spriteme - Create, integrate, and
        maintain CSS sprites with ease.
      
 
      - 
        ZeroSprites - ZeroSprites is a CSS
        sprites generator aimed at area minimization using algorithms used in
        the field of VLSI floorplanning.
      
 
      - 
        CSS Sprite Generator - CSS
        sprites allow you to combine multiple images into a single file.
      
 
      - 
        Sprity - A modular image
        sprite generator with a lot of features: supports retina sprites,
        supports different output formats, generates sprites and proper style
        files out of a directory of images, etc…
      
 
      - 
        Sprite Factory
        - The sprite factory is a ruby library that can be used to generate CSS
        sprites. It combines individual image files from a directory into a
        single unified sprite image and creates an appropriate CSS style sheet
        for use in your web application.
      
 
    
    SVG
    
      - 
        SVGO - SVGO is a Nodejs-based
        tool for optimizing SVG vector graphics files.
      
 
      - 
        SVG OMG - SVGOMG
        is SVGO’s Missing GUI, aiming to expose the majority, if not all the
        configuration options of SVGO.
      
 
      - 
        Grunt-svgmin
        - Minify SVG using SVGO for Grunt.
      
 
      - 
        Gulp-svgmin -
        Minify SVG with SVGO for Gulp.
      
 
      - 
        Scour - Scour is an
        open-source Python script that aggressively cleans SVG files, removing a
        lot of ‘cruft’ that certain tools or authors embed into their documents.
      
 
      - 
        SVG Cleaner - SVG
        Cleaner could help you to clean up your SVG files from unnecessary data.
        It has a lot of options for cleanup and optimization, works in batch
        mode, provides threaded processing on the multicore processors.
      
 
    
    Web Components
    
      - 
        Polymer Bundler
        - Polymer-bundler is a library for packaging project assets for
        production to minimize network round-trips.
      
 
      - 
        Gulp-vulcanize
        - Concatenate a set of Web Components into one file that use Vulcanize.
      
 
    
    Web server Benchmarks
    
      - 
        HTTPerf - httperf is a
        tool for measuring web server performance. It provides a flexible
        facility for generating various HTTP workloads and for measuring server
        performance.
      
 
      - 
        Apache JMeter
        - Open source load testing tool: It is a Java platform application.
      
 
      - 
        Locust - An open source load testing
        tool. Define user behaviour with Python code, and swarm your system with
        millions of simultaneous users.
      
 
      - 
        Autoperf - Autoperf
        is a ruby driver for httperf, designed to help you automate load and
        performance testing of any web application - for a single end point, or
        through log replay.
      
 
      - 
        HTTPerf.rb - Simple
        Ruby interface for httperf, written in Ruby.
      
 
      - 
        PHP-httperf - PHP
        Port of HTTPerf.rb.
      
 
      - 
        HTTPerf.js - JS Port
        of HTTPerf.rb.
      
 
      - 
        HTTPerf.py - Python
        Port of HTTPerf.rb.
      
 
      - 
        Gohttperf - Go Port
        of HTTPerf.rb.
      
 
      - 
        wrk - A HTTP benchmarking tool
        (with optional Lua scripting for request generation, response
        processing, and custom reporting)
      
 
      - 
        beeswithmachineguns
        - A utility for arming (creating) many bees (micro EC2 instances) to
        attack (load test) targets (web applications).
      
 
      - 
        k6 - An open source load testing tool built
        for developers. Easy to integrate into CI pipelines. Tests are written
        in ES6 JS and you can test APIs, microservices and sites using HTTP/1.1,
        HTTP/2 and WebSocket.
      
 
    
    Web server Modules
    
      - 
        PageSpeed Module
        - PageSpeed speeds up your site and reduces page load time. This
        open-source web server module automatically applies web performance best
        practices to pages and associated assets (CSS, JavaScript, images)
        without requiring that you modify your existing content or workflow.
        PageSpeed is available as a module for Apache 2.x and Nginx 1.x.
      
 
      - 
        WebP-detect -
        WebP with Accept negotiation.
      
 
    
    Specs
    
      - 
        Web Performance Working Group
        - The mission of the Web Performance Working Group, part of the Rich Web
        Client Activity, is to provide methods to measure aspects of application
        performance of user agent features and APIs.
      
 
      - 
        Page Visibility -
        This specification defines a means for site developers to
        programmatically determine the current visibility state of the page in
        order to develop power and CPU efficient web applications.
      
 
      - 
        Navigation Timing
        - This specification defines a unified interface to store and retrieve
        high resolution performance metric data related to the navigation of a
        document.
      
 
      - 
        Resource Timing -
        This specification defines an interface for web applications to access
        the complete timing information for resources in a document.
      
 
      - 
        User Timing - This
        specification defines an interface to help web developers measure the
        performance of their applications by giving them access to high
        precision timestamps.
      
 
      - 
        Performance Timeline
        - This specification defines a unified interface to store and retrieve
        performance metric data. This specification does not cover individual
        performance metric interfaces.
      
 
      - 
        CSS will-change
        - This specification defines the 
will-change CSS property
        which allows an author to declare ahead-of-time what properties are
        likely to change in the future, so the UA can set up the appropriate
        optimizations some time before they’re needed. This way, when the actual
        change happens, the page updates in a snappy manner.
       
      - 
        Resource Hints - This
        specification defines the dns-prefetch, preconnect, prefetch, and
        prerender relationships of the HTML Link Element (<link>). These
        primitives enable the developer, and the server generating or delivering
        the resources, to assist the user agent in the decision process of which
        origins it should connect to, and which resources it should fetch and
        preprocess to improve page performance.
      
 
    
    Stats
    
      - 
        HTTP Archive - It’s a
        permanent repository of web performance information such as size of
        pages, failed requests, and technologies utilized. This performance
        information allows us to see trends in how the Web is built and provides
        a common data set from which to conduct web performance research.
      
 
    
    Other Awesome Lists
    
    Contributing
    
      For contributing,
      open an issue
      and/or a
      pull request.