This reminds me of this writeup on doing something similar, with Rust as the native core for an electron app; the Rust in this case is in-process, written using "neon".

This app (Finda) hit a performance target of 16ms rerenders for incremental browser history + desktop file search - computers are fast, even if you use Electron.

- https://keminglabs.com/blog/building-a-fast-electron-app-wit...

- https://github.com/neon-bindings/neon

(edited for formatting)