Learnings from 'ts-blank-space`
ts-blank-space-doc.md Learnings from ts-blank-space tags: TypeScript, type erasure, type stripping ts-blank-space As part of my work on the JavaScript Tooling team at Bloomberg I have implemented an experimental (not yet used in production) package to transform TypeScript into JavaScript using a somewhat novel approach. This is a description of what I learned from implementing the idea. The source
高性能な CSS アニメーションを作成する方法 | Articles | web.dev
大規模で複雑なレイアウトとレイアウトのスラッシングを回避する | Articles | web.dev
大規模で複雑なレイアウトとレイアウトのスラッシングを回避する コレクションでコンテンツを整理 必要に応じて、コンテンツの保存と分類を行います。 レイアウトは、要素の幾何学的情報（要素のサイズやページ内での位置）をブラウザが把握する場所です。各要素には、使用された CSS、要素の内容、親要素に基づいて、明示的または暗黙的なサイズ設定情報が含まれます。このプロセスは、Chrome ではレイアウトと呼ばれます。 レイアウトは、要素の幾何学的情報、要素のサイズ、ページ内での位置をブラウザが判断する場所です。各要素には、使用された CSS、要素の内容、親要素に基づいて、明示的または暗黙的なサイズ設定情報が含まれます。このプロセスは、Chrome（および Edge などの派生ブラウザ）、Safari ではレイアウトと呼ばれます。Firefox ではリフローと呼ばれますが、プロセスは実質的に同じです。
Maglev - V8’s Fastest Optimizing JIT · V8
In Chrome M117 we introduced a new optimizing compiler: Maglev. Maglev sits between our existing Sparkplug and TurboFan compilers, and fills the role of a fast optimizing compiler that generates good enough code, fast enough. Background # Until 2021 V8 had two main execution tiers: Ignition, the interpreter; and TurboFan, V8’s optimizing compiler focused on peak performance. All JavaScript code is
How web bloat impacts users with slow devices
At a first glance, the table seems about right, in that the sites that feel slow unless you have a super fast device show up as slow in the table (as in, max(LCP*,CPU)) is high on lower-end devices). When I polled folks about what platforms they thought would be fastest and slowest on our slow devices (Mastodon, Twitter, Threads), they generally correctly predicted that Wordpress and Ghost and Wor
WasmerのWinterJSのベンチマーク結果はあやしい - laiso
「WinterJS 1.0」の記事がシェアされていたので読んでいたのだけど「Bunより速くなった」と書かれていたので何事と思ってチェックしてみた wasmer.io ベンチマークの文書は以下に公開されている github.com で、まずエラーがめっちゃ出てる Socket errors: connect 155, read 108, write 0, timeout 29 それはいいとして（よくないが）、肝心なところはJarred Sumnerも指摘しているけどwrk -t12 -c400でリクエストの並列処置性能を測っているというのに違和感がある They’re benchmarking their HTTP server running on 12 cores compared to Bun running on 1 core— Jarred Sumner (@jarredsumne
FlatBuffers: FlatBuffers
Overview FlatBuffers is an efficient cross platform serialization library for C++, C#, C, Go, Java, Kotlin, JavaScript, Lobster, Lua, TypeScript, PHP, Python, Rust and Swift. It was originally created at Google for game development and other performance-critical applications. It is available as Open Source on GitHub under the Apache license, v2 (see LICENSE.txt). Why use FlatBuffers? Access to ser
Tracing TypeScript Compiler
Chrome Speed - Largest Contentful Paint change in Chrome 116 to better handle animated content.
Largest Contentful Paint change in Chrome 116 to better handle animated content. Starting around Chrome 116, we're making two changes to the way that LCP handles animated images and videos. In both cases, Chrome will count the time that the first full frame is presented as the timestamp for the candidate. VideosVideos have previously been ignored for LCP, unless they have a poster image. With this
How Back/forward Cache Helped Yahoo! JAPAN News Increase Revenue by 9% on Mobile | web.dev
How Back/forward Cache Helped Yahoo! JAPAN News Increase Revenue by 9% on Mobile Stay organized with collections Save and categorize content based on your preferences. Back/forward cache (or bfcache) is a browser optimization that enables instant back and forward navigation. It significantly improves the browsing experience for users, especially for websites that involve many back and forth naviga
日経電子版での自作 SSR フレームワーク基盤について — HACK The Nikkei
Introducing Deopt Explorer - TypeScript
Over the past few months, during the lead-up to the TypeScript 5.0 beta, our team spent a good portion of our time looking for ways to improve the performance of our compiler so that your projects build faster. One of the ways we improved was by looking into an oft overlooked aspect of many JavaScript VMs: inline caching. A Brief Primer on Inline Caching Inline caching is an optimization often use
How we made Vite 4.3 faaaaster
How we made Vite 4.3 faaaaster 🚀 Just like @sapphi-red said, Vite 4.3 has made amazing performance improvements over Vite 4.2. These benchmarks based on a large project with 1000 react components. And these react components were transformed by vite-plugin-react and vite-plugin-react-swc. As a new rookie on the team, I am so glad that I've joined this party. To let more people know what we did to
Performance without the event loop | Dave Cheney
This article is also available in Japanese, イベントループなしでのハイパフォーマンス – C10K問題へのGoの回答 This article is based on a presentation I gave earlier this year at OSCON. It has been edited for brevity and to address some of the points of feedback I received after the talk. A common refrain when talking about Go is it’s a language that works well on the server; static binaries, powerful concurrency, and high per
500点出す！ - ゆーすけべー日記
Speculation Rules API によるプリレンダリングのためのメトリクス設計
Linux Performance
static, benchmarking, tuning: sar, perf-tools, bcc/BPF: bpftrace, BPF book: Images license: creative commons Attribution-ShareAlike 4.0. This page links to various Linux performance material I've created, including the tools maps on the right. These use a large font size to suit slide decks. You can also print them out for your office wall. They show: Linux observability tools, Linux static perfor
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Layout Thrashing and Forced Reflows
Chrome Platform Status
権威DNSサービスへのDDoSと
ハイパフォーマンスなベンチマーカ / DNS Pseudo random subdomain attack and High performance Benchmarker
