Calibre: Monitor Core Web Vitals and Page Speed with Synthetic and Real-User DataAnalyse synthetic and real-user dataCalibre brings the best of both worlds: reliability of lab testing and user experience signals from real sessions.
Performant UIs using CSS magic
Performance beyond HTTP Animation to improve performance Well executed animation instills perception of performance Not the bad old days of flash 20s transitions Stripe checkout a great example. How can I do this? Bounce.js Pseudo based physics The web is capable of native performance* Case study — ScrollListView.js Performant scrolling library Reusable list items reordered on scroll Uses flexbox
UITableView in JavaScript, list view with re-usable cells using flexbox – Ryan Seddon
UITableView in JavaScript, list view with re-usable cells using flexbox If you’re familiar with iOS development you will know that a UITableView is very efficient when displaying a list of data. A simplification of what it does is display enough cells to fill the viewport plus a few more either side. As you scroll it re-uses cells that are now out of the viewport so a list with thousands of items
How to create high-performance CSS animations | Articles | web.dev
Move an element To move an element, use the translate or rotation keyword values of the transform property. For example, to slide an item into view, use translate. .animate { animation: slide-in 0.7s both; } @keyframes slide-in { 0% { transform: translateY(-1000px); } 100% { transform: translateY(0); } } Use rotate to rotate elements. The following example rotates an element 360 degrees. .animate
What Every Frontend Developer Should Know About Webpage Rendering
What Every Frontend Developer Should Know About Webpage Rendering Today I'd like to focus on the subject of web page rendering and why it is important in web development. A lot of articles are available covering the subject, but the information is scattered and somehow fragmented. To wrap my head around the subject, for example, I had to study a lot of sources. That's why I decided I should write
A follow up to obtaining 60fps scrolling performance
A follow up to obtaining 60fps scrolling performance 60fps scrolling article got quite a few people excited but also a few smart people to point out some flaws in the approach. I was planning to just update the original article but I’ve compiled so much info about this topic that I thought it would be better to do a follow up article and dive into the detail of the techniques that I tried and some
mir.aculo.us JavaScript with Thomas Fuchs » DOM Monster Bookmarklet
DOM Monster is our answer to JavaScript performance tools that just don't give you the full picture. DOM Monster is 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. If there are problems, DOM Monster will point them out—and even make suggestions on how to fix 'em. Drag the DOM Monster! to your bookmarks b
60fps scrolling using pointer-events: none
60fps scrolling using pointer-events: none Paul Lewis did an interesting article a while back about avoiding unnecessary paints through disabling hover effects as the user scrolls, which is a great approach. The down side being managing all your hover states through a parent class. UPDATE: I’ve done a follow up article which demonstrates a more robust technique. That approach doesn’t scale well an
Learn web development | web.dev
Stay organized with collections Save and categorize content based on your preferences. Explore our growing collection of courses on key web design and development subjects. An industry expert has written each course, helped by members of the Chrome team. Follow the modules sequentially, or dip into the topics you most want to learn about.
CSS Sprite画像はDataURI画像にすべきか？ - MOL
最近、スプライト画像はDataURIにすべきですか？という質問が多くて、調べてみました。てか、前のもそんな話題があったような。DataURIってなんぞって方は下記を見てほしい。 データURIスキーム | MOL CSSファイルがパースされなければレンダリングが始まらないのでCSSファイルの肥大化は絶対に避けなければならない。画像の1KBとCSSファイルの1KBを同じように考えてはいけない。 ― ぼくのかんがえたさいきょうのしーえしゅえしゅ あ、ホントそうだっけーなーと思いつつ、どこぞの資料見たんだっけなーと探してたらあった。 Optimizing the Critical Rendering Path for Instant Mobile Websites - Velocity SC 2013 このセッションはすごく分かりやすいのでオススメです（該当の箇所は12分位から）。というかIlya
Does Flexbox Have A Performance Problem? | CSS-Tricks
DigitalOcean provides cloud products for every stage of your journey. Get started with $200 in free credit! Wilson Page wrote a really great article for Smashing Magazine digging into a real world website and all the cool modern tools and techniques he and his team used to build it. For layout, they initially chose flexbox, but… As the app began to grow, we found performance was getting worse and
High Performance Web Frontend
★追記： https://speakerdeck.com/ahomu/high-performance-web-frontend-2013-qiu のほうがブラッシュアップ版です WCAN 2013 Summer (7/6) で行われた、"High Performance Web Frontend…
GPUアクセラレーションとposition: relativeによるレイヤー生成について
またアニメーション... ボタンなどのUIにGPUアクセラレーションが効いたアニメーションをつけたとき、iOSにおいてはiPhone4か4SのWebViewあたり、Androidにおいては….まぁ機種依存的(げんなり)に、アニメーションの立ち上がりが遅いことがあります。 その辺を調査していたところ、position: relativeの指定による、意図しないレイヤー生成＆GPUアクセラレーション巻き込みによって、何かしら合成レイヤー周りでオーバーヘッドが発生してしまっているんではないかな、という憶測に行き着いた次第。今回はその辺りを見ていきます。 GPUアクセラレーションが効いたアニメーションは、CSS Animations、CSS Transitionsのほか、特殊なプロパティ（transform3d: scale(1,1)とか）で強制的にGPUアクセラレーションを効かせたCanvasア
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GitHub - zeman/perfmap: Front-end performance heatmap bookmarklet.
GitHub - addyosmani/tmi: TMI (Too Many Images) - discover your image weight on the web
GitHub - gmetais/grunt-devperf: Helps front-end developers to reach a good quality and good performances, based on phantomas and grunt-phantomas.
GitHub - mdo/css-perf: **Archived.** Derping around with measuring CSS performance.
PageSpeed Insights
Headless Commerce with Salesforce
Adventures in Jank Busting: Parallax, performance, and the new Flickr Home Page | code.flickr.com