We rewrote our Rust WASM Parser in TypeScript – and it got 3x Faster

https://www.openui.com/blog/rust-wasm-parser

Rewriting our Rust WASM Parser in TypeScript | OpenUI

We rewrote our Rust WASM Parser in TypeScript - and it got 3x Faster

What is the purpose of the Rust WASM parser? Didn't understand that easily from the article. Would love a better explanation.