Warp: Improved JS performance in Firefox 83 – Mozilla Hacks - the Web developer blog
Introduction We have enabled Warp, a significant update to SpiderMonkey, by default in Firefox 83. SpiderMonkey is the JavaScript engine used in the Firefox web browser. With Warp (also called WarpBuilder) we’re making big changes to our JIT (just-in-time) compilers, resulting in improved responsiveness, faster page loads and better memory usage. The new architecture is also more maintainable and
A New RegExp Engine in SpiderMonkey – Mozilla Hacks - the Web developer blog
Background: RegExps in SpiderMonkey Regular expressions – commonly known as RegExps – are a powerful tool in JavaScript for manipulating strings. They provide a rich syntax to describe and capture character information. They’re also heavily used, so it’s important for SpiderMonkey (the JavaScript engine in Firefox) to optimize them well. Over the years, we’ve had several approaches to RegExps. Con
Firefox’s New WebSocket Inspector – Mozilla Hacks - the Web developer blog
The Firefox DevTools team and our contributors were hard at work over the summer, getting Firefox 70 jam-packed with improvements. We are especially excited about our new WebSocket inspection feature, because you told us in feedback how important it would be for your daily work. The WebSocket inspector will be released in Firefox 71, but is ready for you to use in Firefox Developer Edition now. To
WebAssembly Interface Types: Interoperate with All the Things! – Mozilla Hacks - the Web developer blog
WebAssembly Interface Types: Interoperate with All the Things! People are excited about running WebAssembly outside the browser. That excitement isn’t just about WebAssembly running in its own standalone runtime. People are also excited about running WebAssembly from languages like Python, Ruby, and Rust. Why would you want to do that? A few reasons: Make “native” modules less complicated Runtimes
Firefox brings you smooth video playback with the world’s fastest AV1 decoder – Mozilla Hacks - the Web developer blog
Firefox brings you smooth video playback with the world’s fastest AV1 decoder Tuesday’s release of Firefox 67 brought a number of performance enhancing features that make this our fastest browser ever. Among these is the high performance, royalty free AV1 video decoder dav1d, now enabled by default on all desktop platforms (Windows, OSX and Linux) for both 32-bit and 64-bit systems. With files mo
Technical Details on the Recent Firefox Add-on Outage – Mozilla Hacks - the Web developer blog
Editor’s Note: May 9, 8:22 pt – Updated as follows: (1) Fixed verb tense (2) Clarified the situation with downstream distros. For more detail, see Bug 1549886. Recently, Firefox had an incident in which most add-ons stopped working. This was due to an error on our end: we let one of the certificates used to sign add-ons expire which had the effect of disabling the vast majority of add-ons. Now tha
Crossing the Rust FFI frontier with Protocol Buffers – Mozilla Hacks - the Web developer blog
My team, the application services team at Mozilla, works on Firefox Sync, Firefox Accounts and WebPush. These features are currently shipped on Firefox Desktop, Android and iOS browsers. They will soon be available in our new products such as our upcoming Android browser, our password manager Lockbox, and Firefox for Fire TV. Solving for one too many targets Until now, for historical reasons, thes
Standardizing WASI: A system interface to run WebAssembly outside the web – Mozilla Hacks - the Web developer blog
Standardizing WASI: A system interface to run WebAssembly outside the web Today, we announce the start of a new standardization effort — WASI, the WebAssembly system interface. Why: Developers are starting to push WebAssembly beyond the browser, because it provides a fast, scalable, secure way to run the same code across all machines. But we don’t yet have a solid foundation to build upon. Code ou
Fast, Bump-Allocated Virtual DOMs with Rust and Wasm – Mozilla Hacks - the Web developer blog
Fast, Bump-Allocated Virtual DOMs with Rust and Wasm Dodrio is a virtual DOM library written in Rust and WebAssembly. It takes advantage of both Wasm’s linear memory and Rust’s low-level control by designing virtual DOM rendering around bump allocation. Preliminary benchmark results suggest it has best-in-class performance. Background Dodrio from a User’s Perspective Internal Design Preliminary Be
Announcing a New Management Structure for Ecma TC39 – Mozilla Hacks - the Web developer blog
Author’s note: You might have noticed that the name of the author appears in this article in the third person. Hi, I’m an engineer at Mozilla working on the Firefox DevTools server. I’m also a TC39 representative. I don’t usually write about myself in the 3rd person. In 2019, Ecma’s TC39 (the standardizing body behind JavaScript/ECMAScript) will be trying something new. The committee has grown in
WebAssembly's post-MVP future: A cartoon skill tree - Mozilla Hacks - the Web developer blog
People have a misconception about WebAssembly. They think that the WebAssembly that landed in browsers back in 2017—which we called the minimum viable product (or MVP) of WebAssembly—is the final version of WebAssembly. I can understand where that misconception comes from. The WebAssembly community group is really committed to backwards compatibility. This means that the WebAssembly that you creat
Calls between JavaScript and WebAssembly are finally fast 🎉 - Mozilla Hacks - the Web developer blog
At Mozilla, we want WebAssembly to be as fast as it can be. This started with its design, which gives it great throughput. Then we improved load times with a streaming baseline compiler. With this, we compile code faster than it comes over the network. So what’s next? One of our big priorities is making it easy to combine JS and WebAssembly. But function calls between the two languages haven’t alw
Sneak Peek at WebAssembly Studio – Mozilla Hacks - the Web developer blog
WebAssembly.Studio is an online IDE (integrated development environment) that helps you learn and teach others about WebAssembly. It’s also a Swiss Army knife that comes in handy whenever working with WebAssembly. We started working on WebAssembly Studio in late December 2017, in an attempt to merge two existing tools that we had developed: WasmExplorer and WasmFiddle. Since then, thanks to severa
JavaScript to Rust and Back Again: A wasm-bindgen Tale – Mozilla Hacks - the Web developer blog
Recently we’ve seen how WebAssembly is incredibly fast to compile, speeding up JS libraries, and generating even smaller binaries. We’ve even got a high-level plan for better interoperability between the Rust and JavaScript communities, as well as other web programming languages. As alluded to in that previous post, I’d like to dive into more detail about a specific component, wasm-bindgen. Today
Shrinking WebAssembly and JavaScript code sizes in Emscripten – Mozilla Hacks - the Web developer blog
Shrinking WebAssembly and JavaScript code sizes in Emscripten Emscripten is a compiler toolchain for asm.js and WebAssembly which lets you run C and C++ on the web at near-native speed. Emscripten output sizes have decreased a lot recently, especially for smaller programs. For example, here’s a little C code: #include <emscripten.h> EMSCRIPTEN_KEEPALIVE int add(int x, int y) { return x + y; } This
Oxidizing Source Maps with Rust and WebAssembly – Mozilla Hacks - the Web developer blog
Edit: Further algorithmic improvements yielded additional speedups over what is described here, for total speedups of up to 10.9x faster than the original implementation. Read about these extra gains in Speed Without Wizardry! Tom Tromey and I have replaced the most performance-sensitive portions of the source-map JavaScript Library’s source map parser with Rust code that is compiled to WebAssembl
Making WebAssembly even faster: Firefox’s new streaming and tiering compiler – Mozilla Hacks - the Web developer blog
Making WebAssembly even faster: Firefox’s new streaming and tiering compiler People call WebAssembly a game changer because it makes it possible to run code on the web faster. Some of these speedups are already present, and some are yet to come. One of these speedups is streaming compilation, where the browser compiles the code while the code is still being downloaded. Up until now, this was just
Entering the Quantum Era—How Firefox got fast again and where it’s going to get faster – Mozilla Hacks - the Web developer blog
Thanks! Please check your inbox to confirm your subscription. If you haven’t previously confirmed a subscription to a Mozilla-related newsletter you may have to do so. Please check your inbox or your spam filter for an email from us. bornjre i developer edition about two weeks ago loved ui but after some time my laptop fan went nuts, i was running only two tabs (one being youtube) and nothing much
Inside a super fast CSS engine: Quantum CSS (aka Stylo) – Mozilla Hacks - the Web developer blog
You may have heard of Project Quantum… it’s a major rewrite of Firefox’s internals to make Firefox fast. We’re swapping in parts from our experimental browser, Servo, and making massive improvements to other parts of the engine. The project has been compared to replacing a jet engine while the jet is still in flight. We’re making the changes in place, component by component, so that you can see th
Why WebAssembly is Faster Than asm.js – Mozilla Hacks - the Web developer blog
WebAssembly, a new binary execution format for the Web, is starting to arrive in stable versions of browsers. A major goal of WebAssembly is to be fast. This post gives some technical details about how it achieves that. Of course, “fast” is relative. Compared to JavaScript and other dynamic languages, WebAssembly is fast because it is statically typed and simple to optimize. But WebAssembly is als
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