On Rendering Diffs
ON RENDERING DIFFS Posted on May 29, 2026 by @amadeus ██████╗ ██╗███████╗███████╗███████╗ ██╔══██╗██║██╔════╝██╔════╝██╔════╝ ██████████╗ ██║ ██║██║█████╗ █████╗ ███████╗ ╚═════════╝ ██║ ██║██║██╔══╝ ██╔══╝ ╚════██║ ██████╔╝██║██║ ██║ ███████║ ╚═════╝ ╚═╝╚═╝ ╚═╝ ╚══════╝ ██╗ ██████╗ ██╗███████╗███████╗███████╗ ██║ ██╔══██╗██║██╔════╝██╔════╝██╔════╝ ██████████╗ ██║ ██║██║█████╗ █████╗ ███████╗ ╚══
GitHub - chenglou/pretext: Fast, accurate & comprehensive text measurement & layout
Pure JavaScript/TypeScript library for multiline text measurement & layout. Fast, accurate & supports all the languages you didn't even know about. Allows rendering to DOM, Canvas, SVG and soon, server-side. Pretext side-steps the need for DOM measurements (e.g. getBoundingClientRect, offsetHeight), which trigger layout reflow, one of the most expensive operations in the browser. It implements its
I Built the Same App 10 Times: Evaluating Frameworks for Mobile Performance | Loren Stewart
Performance context: All frameworks tested achieve excellent Lighthouse scores (100) with similar First Contentful Paint times. Since performance is essentially identical, bundle size is what differentiates these frameworks for mobile users. The 6.1x range matters for data usage, parse time, and battery consumption. Field data validation: The Chrome User Experience Report (CrUX) provides real-worl
Optimizing Javascript for fun and for profit
I often feel like javascript code in general runs much slower than it could, simply because it’s not optimized properly. Here is a summary of common optimization techniques I’ve found useful. Note that the tradeoff for performance is often readability, so the question of when to go for performance versus readability is a question left to the reader. I’ll also note that talking about optimization n
【LINE証券 Frontend】requestIdleCallbackを活用して初期レンダリング時間を約14%削減した話
こんにちは。フィナンシャル開発センターの鈴木です。LINE証券のフロントエンドを担当しています。この記事は【LINE証券 FrontEnd】シリーズの4番目の記事です。 最近のWeb Vitalsの隆盛を受けて、LINE証券のフロントエンドでもパフォーマンスの改善に取り組み始めました。およそ2週間ほど改善に取り組んだ結果として、開発環境での計測ではLighthouseのperformanceスコアが従来より30点ほど上昇しました。 パフォーマンス改善のためにさまざまな施策を行いましたが、この記事ではその中でも興味深かったものとして、requestIdleCallbackを活用してLazy Loadingされるコンポーネントの読み込みを遅延し、その結果初期レンダリングにかかる時間を約14%削減できた事例をご紹介します。 環境 以前の記事でご紹介したとおり、LINE証券のフロントエンドはTyp
FOSDEM 2024 - Fast JavaScript with Data-Oriented Design
FOSDEM 2024/Schedule/Events/Developer rooms/Web Performance/Fast JavaScript with Data-Oriented Design Let’s squeeze the last bits of performance out of JS so that we can crunch massive amounts of data! In this presentation I will describe what I learned while optimizing the Firefox Profiler. The Firefox Profiler is a web application which needs to handle large profiles containing hundreds of thous
2024-02-05のJS: TypeScript 5.4 Beta、Learn Testing/Performance、Interop 2024
JSer.info #679 - TypeScript 5.4 Betaがリリースされました。 Announcing TypeScript 5.4 Beta - TypeScript クロージャーにおけるNarrowing結果の改善、NoInfer Utility Typeが追加されています。 また、ES2024のObject.groupBy/Map.groupByをサポート、Import Attributesのサポートが追加されています。 そのほかには、target: "ES3"やoutオプションなどを非推奨として、次のTypeScript 5.5で削除されることがアナウンスされています。TypeScript 5.5で削除されるオプションは、次のIssueにまとめられています。 Feedback: 5.0 deprecations · Issue #51909 · microsoft/T
Fastest Way of Passing State to JavaScript, Re-visited
Jacob Groß (@kurtextrem@webperf.social, @kurtextrem) is a passionate Software Engineer who loves all topics related to webperf, UX & security. Currently Principal Software Engineer at JSMD Group, based in Munich, Germany. Server-rendered Redux apps commonly have to transfer the store state from the server to the client. Transferring large states can be slow, so in 2019, Henrik Joretag benchmarked
Benchmarking, Profiling, and Optimizing JavaScript libraries
Stéphane Goetz (@onigoetz) is a performance enthusiast. Working on developer tooling, frontend libraries, and architecture as Principal Software Engineer at Swissquote Bank. Introduction I wish to bring you with me on a journey to learn about optimizing a library for localization, I would like to share my learnings with you on benchmarking, profiling, and optimizing. At Swissquote Bank, we use cli
Prettier's CLI: A Performance Deep Dive · Prettier
Hey, I'm Fabio and I've been contracted by the Prettier team to speed up Prettier's command line interface (CLI). In this post we'll take a look at the optimizations I've discovered, the process that lead to finding them, some exciting numbers comparing the current CLI with the new one, and some guesses about what could be optimized next. Installation The new work-in-progress CLI for Prettier has
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Third Parties and Single Points of Failure
Immer perf appears to have gotten worse over time, based on updated benchmarks · Issue #1152 · immerjs/immer
PerformanceElementTiming - Web APIs | MDN
The journey so far
GitHub - e18e/e18e
lorenzofox blog | Template engine with streaming capability - part 1/2
Measuring, monitoring and optimizing TTFB with Server timing
feat: Re-optimize alphabet for Brotli (only chars unused by gzip backrefs) by subzey · Pull Request #310 · ai/nanoid
Improve chunking performance by lukastaegert · Pull Request #4862 · rollup/rollup
GitHub - oxc-project/oxc: ⚓ A collection of high-performance JavaScript tools.
