This is interesting.
Compacting garbage collector, written in very unsafe Rust
this post was submitted on 16 Nov 2025
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This is super cool! I love seeing these new implementations of JS. boa is another JS runtime written in Rust as well.
I'm curious how easy it is to embed this. Can I use it from another Rust project? Can I customize module loading behavior, or set limits on the runtime to limit CPU usage or memory usage or intercept network calls? Can I use it from a non-Rust project? Or is this intended to be a standalone JS runtime called from the CLI? I've been looking at Boa as a JS engine for one of my projects, but I'm open to checking out brimstone too if it'll work.
Would be cool to have a comparison with bun.
And Deno
Bun uses JavaScriptCore. Deno uses V8.
But yes it would be good to see a comparison to JavascriptCore and V8.
There’s many components which could be split out from this JS engine such as Regex.
I’d love to see how it passes all ECMA tests