V8 VS Wren

It sounds like you want to know how JavaScript is implemented in the browser. The thing is, there is no universal implementation for JavaScript. JavaScript defines a specification that must be adhered to, and then each browser vendor can implement it in whatever way they see fit, as long as it does the specified things. For example (and I'm not saying this is the case) it's entirely possible for Chrome to implement Array.sort() using merge sort, while Firefox implements it as quick sort. You can try to find the source code for the implementation in a certain browser, but that will not be universal. I imagine you can find out how it works in Chrome somewhere in https://chromium.googlesource.com/v8/v8.git, though I'm not sure exactly where.

chrome v8 commits referring to spread operator one of them: https://github.com/v8/v8/commit/93b3397e52d3faf38059718de335027e57b9690d

Looks like these are the two commits, based on the issue number:

https://github.com/v8/v8/commit/0981e91a4f8692af337e2588562a...

https://github.com/v8/v8/commit/a2cae2180a7a6d64ccdede44d730...

Although there could be others.

https://github.com/v8/v8/blob/master/src/objects/dictionary.h https://wiki.cdot.senecacollege.ca/wiki/Inline_Assembly_Language https://en.cppreference.com/w/c/language/asm https://en.wikipedia.org/wiki/Inline_assembler https://stackoverflow.com/questions/2268562/what-are-intrinsics https://www.codeproject.com/Articles/15971/Using-Inline-Assembly-in-C-C https://stackoverflow.com/questions/48518225/what-are-intrinsic-types-in-javascript https://stackoverflow.com/questions/12168575/executing-generated-assembler-inline

It must be a fairly large echo chamber since it has room for Clang, GCC, V8, OpenJDK, Roslyn, etc. (The Zend parser for PHP seems to use some flavor of YACC, but given PHP, I don't know if that strengthens or weakens my point.)

What you're describing is not really possible with JS. Your best bet would be to look at the "V8 engine" source code. It is the interpreter used in Node.js and Chrome (and I think Edge would be using it too as Edge is built on Chromium). But there is nothing forcing Node.js to use V8, there are other JS interpreters. https://github.com/v8/v8

Bob Nystrom also has a blog, and his articles are really well written (see his post on Pratt parsers / garbage collectors). I'd also recommend going through the source code for Wren, it shares a lot of code with Lox. Despite the deceptive simplicity of the implementation, it (like Lox) is incredibly fast - it's a great way to learn how to build production grade compilers in general.

This is very nice! Well done! Can you open an issue on the wren lang repository and mention this? https://github.com/wren-lang/wren Wren is also written by Bob Nystrom and the implementations share a lot of things.

Only kind of unrelated ... Every time I see the Bevy logo I'm reminded of Wren language https://wren.io/

Check out the source to Wren: https://wren.io. It’s from the author of Crafting Interpreters and builds directly on what’s discussed in the book (essentially a more complete Lox) and adds several additional types, including an array.

The best C code I have ever read is that of wren.

Well, basically I copied the second link from https://github.com/wren-lang/wren/wiki/Language-Bindings just randomly; I didn't think to check the release date to be honest with you, my bad.

The other Rust projects seems more updated, like https://github.com/Jengamon/ruwren was last updated in May 9.