Posts List

JavaScript Binary AST diaries - How to replace proving with validating for fun and profit

In this entry, I’d like to discuss one of the most interesting and unusual aspects of the Binary AST: how we gain performance by turning proof-building into validation, and why this is very good news for performance (and maybe not so good news for file size).

Binary AST - Motivations and Design Decisions - Part 1

“The key to making programs fast is to make them do practically nothing.” - Mike Haertel, creator of GNU Grep. Binary AST - “Binary Abstract Syntax Tree” - is Mozilla’s proposal for specifying a binary-encoded syntax for JS with the intent of allowing browsers and other JS-executing environments to parse and load code as much as 80% faster than standard minified JS. It has recently cleared Stage 1 of the TC39 standards process, and while the final byte-level format isn’t completely nailed down, we’re confident that the final implementation will deliver the impressive performance improvements promised by the prototype.

JavaScript Binary AST Engineering Newsletter #1

Hey, all cool kids have exciting Engineering Newsletters these days, so it’s high time the JavaScript Binary AST got one! Summary JavaScript Binary AST is a joint project between Mozilla and Facebook to rethink how JavaScript source code is stored/transmitted/parsed. We expect that this project will help visibly speed up the loading of large codebases of JS applications and will have a large impact on the JS development community, including both web developers, Node developers, add-on developers and ourselves.

Towards a JavaScript Binary AST

In this blog post, I would like to introduce the JavaScript Binary AST, an ongoing project that we hope will help make webpages load faster, along with a number of other benefits. A little background Over the years, JavaScript has grown from one of the slowest scripting languages available to a high-performance powerhouse, fast enough that it can run desktop, server, mobile and even embedded applications, whether through web browsers or other environments.