It uses IPC to give the WebView patches of what to do. There is a wee bit of JS there that parses the IPC and applies the patch to the DOM.

Here's the code: https://github.com/DioxusLabs/dioxus/tree/master/packages/in...

This explains how Dioxus also has a LiveView mode - that sounds exactly how LiveView works.

So is my parent wrong and my grandparent correct? Because that is what I thought as well. DOM mutations are still happening via JS, so while the business logic might be in Rust, the mutations are still bounded by the speed of JS.

DOM mutations still happen in JS, they are just send from native-rust code. It is exactly like a liveview with a local server + webview wrapper