Instead of a rewrite, why not try using AgGrid? It's a pure JS grid library that's really fast and it's got react bindings. It's even got a batch update API.

Instead of a rewrite, why not try using AgGrid? It's a pure JS grid library that's really fast and it's got react bindings. It's even got a batch update API. I doubt that naively rewriting the app in Svelte is gonna give you the perf boost you're looking for.