September 29, 2021 by Henning Dieterichs, @hediet_dev When dealing with deeply nested brackets in Visual Studio Code, it can be hard to figure out which brackets match and which do not. To make this easier, in 2016, a user named CoenraadS developed the awesome Bracket Pair Colorizer extension to colorize matching brackets and published it to the VS Code Marketplace. This extension became very popu
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
AIエージェントのUXを進化させる「A2UI」でアプリを構築 - Taste of Tech Topics
こんにちは。大塚です。 普段は生成AIを利用したサービスの開発に携わっているのですが、直近の仕事では、数理最適化の手法を扱う機会がありました。 実は、大学の授業で数理最適化をかじっており、教授がよく 「人の勘や経験に頼っている部分を数式に落とし込むことで、合理的な意思決定ができるようにしよう。」 といっていたことを思い出しました。 まさに今、それを仕事で実践できており、面白くなってきました。 さて、今回のテーマは最適化ではなく、AIエージェントのUIについてです。 現在の生成AIアプリのUIといえば、「チャット」形式がほとんどの状況だと思いますが、チャットのアプリは汎用的な一方で、入力を制御したり、画像や動画の表示が難しかったりと、限界を感じることってありませんか？ そんな悩みを解決してくれる、「A2UI（Agent to UI）」という、AIエージェント用のUIプロトコルが、2025年1
Today we’re excited to announce the availability of TypeScript 4.7! If you’re not yet familiar with TypeScript, it’s a language that builds on JavaScript and adds syntax for types. Types help describe what kinds of values you’re working with and what kinds of functions you’re calling. TypeScript can use this information to help you avoid about mistakes like typos, missing arguments, or forgetting
Temporal: The 9-Year Journey to Fix Time in JavaScript
Welcome to our blog! I'm Jason Williams, a senior software engineer on Bloomberg's JavaScript Infrastructure and Terminal Experience team. Today the Bloomberg Terminal runs a lot of JavaScript. Our team provides a JavaScript environment to engineers across the company. Bloomberg may not be the first company you think of when discussing JavaScript. It certainly wasn't for me in 2018 before I worked
缶つぶし機とソフトウェア移行技術 - Refactoring to Rust の読書感想文 - じゃあ、おうちで学べる
はじめに ——あるいは、「知っている」と「理解している」の間 Rustのことは、知っていた。学習もしていた。実務でも使っていた。 でも、それは知っているつもりだった。 知ってるつもり 無知の科学 (ハヤカワ文庫NF) 作者:スティーブン スローマン,フィリップ ファーンバック早川書房Amazon 日々Rustで開発し、BoxとRcとArcを使い分け、tokio::spawnでタスクを生成し、?演算子を当たり前のように書いている。FFI？PyO3使えばいいでしょ。WebAssembly？wasm-bindgenがあるじゃない。技術的には、確かに「使える」レベルにはあった。 でも、心のどこかで感じていた違和感があった。 オートバイのエンジンを分解できる人と、エンジンが動く原理を理解している人は違う。コードが動くことと、なぜそう書くべきかを理解することも違う。私は前者だった。メカニックではあった
All JavaScript and TypeScript Features of the last 3 years
TypeScript as envisioned by Stable DiffusionThis article goes through almost all of the changes of the last 3 years (and some from earlier) in JavaScript / ECMAScript and TypeScript . Not all of the following features will be relevant to you or even practical, but they should instead serve to show what’s possible and to deepen your understanding of these languages. There are a lot of TypeScript fe
Update 1.69.1: The update addresses these issues. Update 1.69.2: The update addresses these issues. Downloads: Windows: x64 Arm64 | Mac: Universal Intel silicon | Linux: deb rpm tarball Arm snap Welcome to the June 2022 release of Visual Studio Code. There are many updates in this version that we hope you'll like, some of the key highlights include: 3-way merge editor - Resolve merge conflicts wit
Weird Lexical Syntax
I just learned 42 programming languages this month to build a new syntax highlighter for llamafile. I feel like I'm up to my eyeballs in programming languages right now. Now that it's halloween, I thought I'd share some of the spookiest most surprising syntax I've seen. The languages I decided to support are Ada, Assembly, BASIC, C, C#, C++, COBOL, CSS, D, FORTH, FORTRAN, Go, Haskell, HTML, Java,
Introduction to Go 1.21 The latest Go release, version 1.21, arrives six months after Go 1.20. Most of its changes are in the implementation of the toolchain, runtime, and libraries. As always, the release maintains the Go 1 promise of compatibility; in fact, Go 1.21 improves upon that promise. We expect almost all Go programs to continue to compile and run as before. Go 1.21 introduces a small ch
AST vs. Bytecode: Interpreters in the Age of Meta-Compilation
233 AST vs. Bytecode: Interpreters in the Age of Meta-Compilation OCTAVE LAROSE, University of Kent, UK SOPHIE KALEBA, University of Kent, UK HUMPHREY BURCHELL, University of Kent, UK STEFAN MARR, University of Kent, UK Thanks to partial evaluation and meta-tracing, it became practical to build language implementations that reach state-of-the-art peak performance by implementing only an interprete
Speeding up the JavaScript ecosystem - Rust and JavaScript Plugins
Over the past year (2024) there has been a strong movement to rewrite JavaScript tools in Rust to make them faster. Rust is well suited for this as it runs much closer to hardware and doesn't rely on garbage collection. This makes it an ideal candidate for computationally intensive tasks. Linting in its basic form is such a task, as it involves parsing and traversing lots of source code. But there
Today we’re excited to announce our Release Candidate (RC) of TypeScript 4.7! Between now and the stable release of TypeScript 4.7, we expect no further changes apart from critical bug fixes. To get started using the RC, you can get it through NuGet, or use npm with the following command: npm install typescript@rc You can also get editor support by Downloading for Visual Studio 2022/2019 Following
Show navigation A recent article on WebAssembly Garbage Collection (WasmGC) explains at a high level how the Garbage Collection (GC) proposal aims to better support GC languages in Wasm, which is very important given their popularity. In this article, we will get into the technical details of how GC languages such as Java, Kotlin, Dart, Python, and C# can be ported to Wasm. There are in fact two m
In React Labs posts, we write about projects in active research and development. We’ve made significant progress on them since our last update, and we’d like to share what we learned. React Server Components React Server Components (or RSC) is a new application architecture designed by the React team. We’ve first shared our research on RSC in an introductory talk and an RFC. To recap them, we are
Patterns for Building LLM-based Systems & Products [ llm engineering production 🔥 ] · 66 min read Discussions on HackerNews, Twitter, and LinkedIn “There is a large class of problems that are easy to imagine and build demos for, but extremely hard to make products out of. For example, self-driving: It’s easy to demo a car self-driving around a block, but making it into a product takes a decade.”
Introduction HTML, the programming language, is a practical, turing-complete[1], stack-based programming language based on HTML, the markup language. It uses elements defined in HTML, the markup language, in order to do computations. To give you a sense of what HTML, the programming langauge, looks like, below is a sample program that prints the values from 1 to 10 to standard out (console.log) A
A Walk with LuaJIT
The following is a chronicle of implementing a general purpose zero-instrumentation BPF based profiler for LuaJIT. Some assumptions are made about what this entails and it may be helpful to read some of our other work in this area. One major change from prior efforts is that instead of working with the original Parca unwinder we are now working with the OpenTelemetry eBPF profiler. If you missed t
Delimiter-first code
Summary I argue for wider usage of delimiter-first in the code three friends [tic, tac, toe] becomes three friends ・tic ・tac ・toe. A new top-level syntax for programming languages is proposed to show advantages of this method. New syntax is arguably as simple, but more consistent, better preserves visual structure and solves some issues in code formatting. Related: comma-first formatting A well-kn
When it comes to client-side storage in web applications, the localStorage API stands out as a simple and widely supported solution. It allows developers to store key-value pairs directly in a user's browser. In this article, we will explore the various aspects of the localStorage API, its advantages, limitations, and alternative storage options available for modern applications. What is the local
When a single-page application needs to fetch data from a remote source, it needs to do so while remaining responsive and providing feedback to the user during an often slow query. Five patterns help with this. Asynchronous State Handler wraps these queries with meta-queries for the state of the query. Parallel Data Fetching minimizes wait time. Fallback Markup specifies fallback displays in marku
Comprehensive guide to JavaScript performance analysis using Chrome DevTools
Comprehensive guide to JavaScript performance analysis using Chrome DevTools Let's see how to navigate the Chrome Devtools Performance tab to effectively analyse and improve the performance of your JavaScript while avoiding common errors. Our use case will be improving the rendering FPS of a real-world canvas library. A few weeks ago a colleague of mine and I were looking at the canvas engine comp
The year is 2023 and we’ve released Node.js v20. It’s a significant accomplishment, and this article aims to use scientific numbers to assess the state of Node.js’ performance. All the benchmark results contain a reproducible example and hardware details. To reduce the noise for regular readers, the reproducible steps will be collapsed at the beginning of all sections. This article aims to provide
Google Sheets is one of the first products at Google to use WasmGC on Chrome. The move was announced in 2022, and the Sheets and Chrome teams partnered on standardization, engineering, and tooling to provide real-time feedback on optimizations. This partnership set a precedent for how engineering teams at Google can effectively work with Chrome to have more Google apps running on WasmGC. The chall
MAI-Thinking-1: Building a Hill-Climbing Machine The Microsoft AI Team 1 Abstract Progress in AI is driven not by a single model, but by the ability to continually improve upon the current state of models. Achieving this requires treating model development as a system-level optimization problem, for which the solution is building a hill-climbing machine for rapid improvement. Our process includes
Jun 10, 2024 by Jen Simmons, Jon Davis, Karl Dubost, Anne van Kesteren, Marcos Cáceres, Ada Rose Canon, Tim Nguyen, Sanjana Aithal, Pascoe, and Garrett Davidson ContentsWebXRCSSWeb apps for MacSafari ExtensionsSpatial mediaHTMLMediaWebRTCPasskeysHTTPSJavaScriptWeb APICanvasWebGLWeb InspectorWKWebViewApple PayDeprecationsBug Fixes and moreHelp us Beta TestFeedback The last year has been a great one
A few months ago we saw a post on the r/programminghorror subreddit: A developer describes the struggle of identifying a syntax error resulting from an invisible Unicode character hidden in JavaScript source code. This post inspired an idea: What if a backdoor literally cannot be seen and thus evades detection even from thorough code reviews? Just as we were finishing up this blog post, a team at
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
V8’s end-tier optimizing compiler, Turbofan, is famously one of the few large-scale production compilers to use Sea of Nodes (SoN). However, since almost 3 years ago, we’ve started to get rid of Sea of Nodes and fall back to a more traditional Control-Flow Graph (CFG) Intermediate Representation (IR), which we named Turboshaft. By now, the whole JavaScript backend of Turbofan uses Turboshaft inste
research!rsc: Floating-Point Printing and Parsing Can Be Simple And Fast (Floating Point Formatting, Part 3)
Introduction A floating point number f has the form f=m·2e where m is called the mantissa and e is a signed integer exponent. We like to read numbers scaled by powers of ten, not two, so computers need algorithms to convert binary floating-point to and from decimal text. My 2011 post “Floating Point to Decimal Conversion is Easy” argued that these conversions can be simple as long as you don’t car
The Promise of Memoization Link to headingWhen React applications start to slow down, React.memo, useMemo, and useCallback are often the first tools developers reach for. After all, preventing unnecessary re-renders seems like a straightforward path to better performance. But in the React ecosystem, memoization is far more complex than it first appears. In this post, we’ll look at how these tools
V Language Review (2022)
V is a programming language promising to be “Simple, fast, safe, compiled. For developing maintainable software.” V has a controversial past but what is the state of V in 2022? Is V worth checking out? In this post, we’ll take a look at V as it exists in May 2022. TLDR Read the summary Rules of engagement I’ll be using the current version of V built from git which is 50ab2cfd1ae02d4f4280f38c60b8db
Introducing Zod Codecs
Zod 4.1 introduced a new z.codec() API for defining bi-directional transformations in Zod. The problem with transformsZod's .transform() method is great for one-way data conversion: const stringToNumber = z.string().transform(val => parseFloat(val)); stringToNumber.parse("42"); // 42But what if you need to go both ways? Say, you're storing dates as ISO strings in a database but want to work with D
Tech Solvency: The Story So Far: CVE-2021-44228 (Log4Shell log4j vulnerability).
Log4Shell log4j vulnerability (CVE-2021-44228 / CVE-2021-45046) - cheat-sheet reference guide Last updated: $Date: 2022/02/08 23:26:16 $ UTC - best effort, validate all for your environment/model before use, unofficial sources may be wrong by @TychoTithonus (Royce Williams), standing on the shoulders of many giants Send updates or suggestions (please include category / context / public (or support
Reading the excellent article by JeanHeyd Meneide on how broken string encoding in C/C++ is made me realise that Unicode is a topic that is often overlooked by a large number of developers. In my experience, there’s a lot of confusion and wrong expectations on what Unicode is, and what best practices to follow when dealing with strings that may contain characters outside of the ASCII range. This a
Short list of C esoterica
Mini-post: Digraphs and Trigraphs | ENOSUCHBLOG C alternative tokens - Wikipedia Why are there digraphs in C and C++? - Stack Overflow Purpose of Trigraph sequences in C++? A brief description of Normative Addendum 1 Designated initializer # These allow you to specify which elements of an object (array, structure, union) are to be initialized by the values following. The order does not matter! str
8.x バリデーション Laravel
イントロダクションIntroduction Laravelは、アプリケーションの受信データをバリデーションするために複数の異なるアプローチを提供します。すべての受信HTTPリクエストで使用可能なvalidateメソッドを使用するのがもっとも一般的です。しかし、バリデーションに対する他のアプローチについても説明します。Laravel provides several different approaches to validate your application's incoming data. It is most common to use the validate method available on all incoming HTTP requests. However, we will discuss other approaches to validation as well
Introduction to Go 1.22 The latest Go release, version 1.22, arrives six months after Go 1.21. Most of its changes are in the implementation of the toolchain, runtime, and libraries. As always, the release maintains the Go 1 promise of compatibility. We expect almost all Go programs to continue to compile and run as before. Changes to the language Go 1.22 makes two changes to “for” loops. Previous
Introduction: Density Is King (With a Tiny VM) I've previously come to the conclusion that there's little reason for using bytecode in the modern world, except in order to get more compact code, for which it can be very effective. So, what kind of a bytecode engine will give you more compact code? Suppose I want a bytecode interpreter for a very small programming environment, specifically to minim
Part of my job is to make JavaScript things go fast. Speed is a feature, and when working in an interpreted language, squeezing every last bit of performance can be the difference between a great product and unusable garbage. Anyway, how cool would it be to make JavaScript itself go faster? I’m not a C++ programmer, but that didn’t stop me before, so I thought I’d give it a try anyway! The objecti
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Bracket pair colorization 10,000x faster
Optimizing Javascript for fun and for profit
Announcing TypeScript 4.7 - TypeScript
June 2022 (version 1.69)
Go 1.21 Release Notes - The Go Programming Language
Announcing TypeScript 4.7 RC - TypeScript
A new way to bring garbage collected programming languages efficiently to WebAssembly · V8
React Labs: What We've Been Working On – March 2023 – React
Patterns for Building LLM-based Systems & Products
HTML: The Programming Language
Using localStorage in Modern Applications - A Comprehensive Guide | RxDB - JavaScript Database
Data Fetching Patterns in Single-Page Applications
State of Node.js Performance 2023
Why Google Sheets ported its calculation worker from JavaScript to WasmGC | web.dev
MAI-Thinking-1: Building a Hill-Climbing Machine
News from WWDC24: WebKit in Safari 18 beta
The Invisible JavaScript Backdoor – Certitude Blog
Prettier's CLI: A Performance Deep Dive · Prettier
Land ahoy: leaving the Sea of Nodes · V8
React.memo Demystified: When It Helps and When It Hurts
Unicode is harder than you think · mcilloni's blog
Go 1.22 Release Notes - The Go Programming Language
bytecode interpreters for tiny computers ⁑ Dercuano
I made JSON.parse() 2x faster