Also just so you know, Brave isn't "written" in Rust alone, it is a big software with a lot of parts, including but not limited to a rendering engine, a JS VM and a WASM engine.
The Rust part at most (unconfirmed) would be the glue that connects them together, and I doubt that's where the bottleneck is for most browsers.
>The new algorithm with optimised set of rules is 69x faster on average than the current engine.
Jesus, why does everyone these days automatically assumes that everyone else is using Chrome or Chromium? It's almost as crazy as calling Windows a "PC".