Fast is good, instant is better!
Barry Pollard (@tunetheweb, @tunetheweb@webperf.social) is a Web Performance Developer Advocate in the Google Chrome team, working on Core Web Vitals and the Chrome User Experience Report (CrUX), and is one of the maintainers of the HTTP Archive. He's also the author of HTTP/2 in Action from Manning Publications. Fast page loading is so last year… you should be thinking about instant page loads! I
A Performance Maturity Matrix
Brian Louis Ramirez (@screenspan@mastodon.green) worked for many years in UX before falling in love with web perf. He blogs at https://screenspan.net/. Optimizing the performance of a digital product goes beyond technical tweaks. You have to make systematic changes to the organization behind it. So how to know what part of the system to work on first? When I worked as a web performance consultant
Case Study: React partial SSR with SFCC
Lyubomir Angelov (@angelovcode) is a Web Performance enthusiast working as Development Team Leader at Isobar Commerce. Contributing to the web since 2007 he went through hundreds of platforms and solutions. He is passionate to work with people to build great platforms. Perfectionist, sports man and tries to learn lock picking. This case study shows one way to implement partial Server-Side Renderin
The ugly truth about optimising beautiful images
Michael Gooding (@Michael_G_81) is a performance Geek at Akamai, working with customers, staff and basically anyone that will listen. A premature grumpy old man, slow websites just add to the grumpiness and grey hairs. Read any performance blog or attend any performance talk and everyone will advise you that optimising images is the best place to start (insert the ever present low hanging fruit ph
JavaScript component-level CPU costs
Stoyan (@stoyanstefanov) is a Facebook engineer, former Yahoo!, writer ("JavaScript Patterns", "React: Up and Running"), speaker (JSConf, Velocity, Fronteers), toolmaker (Smush.it, YSlow 2.0) and a guitar hero wannabe. Let’s talk a bit about keeping tabs on how much CPU is consumed by an application’s JavaScript. And let’s frame the discussion around components – the atomic building blocks of the
Performance Calendar » QUIC and HTTP/3 : Too big to fail?!
Robin Marx is a Web Performance PhD candidate at Hasselt University, Belgium. He is mainly looking into HTTP/2 and QUIC performance, and maintains the TypeScript QUIC implementation Quicker. In a previous life he was a multiplayer game programmer and co-founder of LuGus Studios. YouTube videos of Robin are either humoristic technical talks or him hitting other people with longswords. QUIC and HTTP
Performance insurance
We are talking a lot about performance, how it can be improved, which tools to use for performance improvements but less about how to keep reached performance on a proper level. So, let’s take a look at tools which can help you to do so. Size Limit ai/size-limit Size Limit is a tool to prevent JavaScript libraries bloat. With it, you know exactly for how many kilobytes your JS library increases th
A Tinder Progressive Web App Performance Case Study
Addy Osmani (@addyosmani) is an Engineering Manager working with the Chrome and Web Developer Relations teams at Google. He's written open-source books like 'Learning JavaScript Design Patterns' and 'Essential Image Optimization' and created open-source projects like Yeoman, HNPWA and Critical. You can find more of his work on web performance over on his Medium channel. Tinder recently swiped righ
Clearing cache in the browser
Andrew Betts (@triblondon) is a web developer and principal developer advocate for Fastly, working with developers across the world to help make the web faster, more secure, more reliable and easier to work with. He founded a web consultancy which was ultimately acquired by the Financial Times, led the team that created the FT's pioneering HTML5 web app, and founded the FT's Labs division. He is a
SQIP - Vague Vectors for Performant Previews
Tobias Baldauf (@tbaldauf) leads the Core Frontend team at trivago. He creates DevOps tools, image optimization algorithms & speaks at conferences. He's a proud dad, mindful veggy & music lover. Find out more at who.tobias.is tl;dr:Image placeholders in SVG are ready for prime time thanks to browser support and good rendering performance. By automating SVG shape creation that mimics main features
A Tale of Four Caches
Yoav Weiss (@yoavweiss) has been working on mobile Web performance for longer than he cares to admit. He takes image bloat on the Web as a personal insult, which is why he joined the Responsive Image Community Group and implemented the various responsive images features in Blink and WebKit. He is now working at Akamai as a Principal Architect, focused on making the Web platform faster by adding pe
Critical Metric: Critical Resources
Steve works at SpeedCurve on the interplay between performance and design. He previously served as Google's Head Performance Engineer, Chief Performance Yahoo!, and Chief Performance Officer at Fastly. Steve has pioneered much of the work in the world of web performance. He is the author of High Performance Web Sites and Even Faster Web Sites. He is the creator of many performance tools and servic
You don't need a framework for that
Estelle Weyl (@estellevw) started her professional life in architecture and then managed teen health programs. In 2000, Estelle took the natural step of becoming a web standardista. She currently writes for MDN Developer Network and organizes #PerfMatters Conference. She has consulted for Kodak Gallery, SurveyMonkey, Samsung, Yahoo, Visa, and Apple, among others. Estelle shares esoteric tidbits le
Lighthouse: Lighting the way to better web performance
Dean Hume (@DeanoHume) is a software developer and author based in London, U.K. He is passionate about web performance, and he regularly writes on his blog - deanhume.com. As a web developer, I’m always excited when it comes to finding new data about the performance of the websites that I build. During my day-to-day development, I recently stumbled upon a tool called Lighthouse. It’s an open-sourc
HTTP/2 Push: The details
Robin Marx (@programmingart) is a Web Performance researcher at Hasselt University, Belgium. He is currently looking into HTTP/2 performance for media-rich websites in the context of the iMinds PRO-FLOW project. In a previous life he was a multiplayer game programmer and co-founder of LuGus Studios. HTTP/2 (h2) is here and it tastes good! One of the most interesting new features is h2 push, which
Third party content in an HTTP/2 and ad blockers world
Yoav Weiss (@yoavweiss) does not get discouraged easily and is not afraid of code. He is a Web performance and browser internals specialist, especially interested in the intersection between Responsive Web Design and Web performance. He has implemented the various responsive images features in Blink and WebKit as part of the Responsive Images Community Group, and is currently working at Akamai, fo
Loading ES2015 modules using combo service
Iliyan Peychev (@ipeychev) is a Software Engineer and UI Infrastructure Lead. He started as C developer thirteen years ago, when he was writing software for banks and other financial institutions. Then he became Java developer working in the area of SmartCards and Security. Now Iliyan is fully devoted to JavaScript and Front-End development. He is highly interested in Server-side JavaScript (NodeJ
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Wikipedia's Worldwide Web: CPU benchmark
Tracking CPU with Long Tasks API
Beyond HTTPS