はじめに 僕はDeno Land Inc.でDenoを利用したサーバレスエッジホスティングサービスのDeno Deployを開発するチームに所属しています。OSSのほうのDenoのメイン言語はRustで、Deno Deployのバックエンドも同様にRustで書かれています。 今年のアドベントカレンダーで一休さんから以下の記事が公開されましたが、日本でもRustをWebバックエンドの言語として採用する企業がじわじわと増えてきている印象があります。 Deno DeployのバックエンドをRustで開発してきて、RustでWebバックエンドを書くことのメリットやデメリットをいくつか感じたので、この記事で紹介したいと思います。 Deno Deployの構成 まず、ざっくりとDeno Deployのバックエンドの構成を紹介します。 多くのコンポーネントがありますが、ここではどのようにRustを利用し
Chrome の JavaScript はとても高速なことでも有名ですが、その実行エンジンは V8 と呼ばれます。V8 自体は独立したモジュールであり、Node.js 等にも使われております。 V8 が JavaScript を高速に実行する技術の一つが JIT (Just In Time) コンパイルです（一般的に JIT と呼ばれます）。これは、そのまま実行すると遅い JavaScript を実行中にリアルタイムに直接マシンコードに変換し（これが Just In Time と呼ばれる所以です）、途中からそのコードに入れ替えて実行することで高速化を達成しています。特に何度も実行される関数で効力を発揮します。 JIT という名前は聞いたことがあろうとも、実際に JIT がどのようなコードを実行しているのかを確認する機会は滅多にないでしょう。この記事では、実際に V8 の JIT の出力を確
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
Object Structure in JavaScript EnginesFrom a developer's perspective, objects in JavaScript are quite flexible and understandable. We can add, remove, and modify object properties on our own. However, few people think about how objects are stored in memory and processed by JS engines. Can a developer's actions, directly or indirectly, impact performance and memory consumption? Let's try to delve i
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 main approaches:
After almost three years since the initial design document and hundreds of CLs in the meantime, the V8 Sandbox — a lightweight, in-process sandbox for V8 — has now progressed to the point where it is no longer considered an experimental security feature. Starting today, the V8 Sandbox is included in Chrome's Vulnerability Reward Program (VRP). While there are still a number of issues to resolve be
Welcome to the thrilling world of V8, where speed is not just a feature but a way of life. As we bid farewell to 2023, it's time to celebrate the impressive accomplishments V8 has achieved this year. Through innovative performance optimizations, V8 continues to push the boundaries of what's possible in the ever-evolving landscape of the Web. We introduced a new mid-tier compiler and implemented se
nodebestpractices/sections/errorhandling/returningpromises.md at master · goldbergyoni/nodebestpractices
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session. You switched accounts on another tab or window. Reload to refresh your session. Dismiss alert
Iterator helpers are a collection of new methods on Iterator prototype that help in general use of iterators. Since these helper methods are on the iterator prototype, any object that has Iterator.prototype on its prototype chain (e.g. array iterators) will get the methods. In the following subsections, we explain iterator helpers. All the provided examples are working in a blog archive page that
Control-flow integrity (CFI) is a security feature aiming to prevent exploits from hijacking control-flow. The idea is that even if an attacker manages to corrupt the memory of a process, additional integrity checks can prevent them from executing arbitrary code. In this blog post, we want to discuss our work to enable CFI in V8. Background # The popularity of Chrome makes it a valuable target for
j次のブックマーク
k前のブックマーク
lあとで読む
eコメント一覧を開く
oページを開く
RustでWebバックエンドを書き始めてから1年くらい経った
JavaScript 実行エンジン V8 の JIT 出力コードを読んでみよう
Optimizing Javascript for fun and for profit
Object Structure in JavaScript Engines
A new way to bring garbage collected programming languages efficiently to WebAssembly · V8
The V8 Sandbox · V8
V8 is Faster and Safer than Ever! · V8
Iterator helpers · V8
Control-flow Integrity in V8 · V8