I'm not working on Obsidian, but I'm also building a desktop app with Electron now and a non-obvious performance tip is to offload things from the main process to a separate child process and use something like node-ipc to communicate. Especially if you use sqlite3 to store data (even though it has an API with callbacks, it's blocking).

https://medium.com/actualbudget/the-horror-of-blocking-elect...

https://news.ycombinator.com/item?id=16616374

https://archive.jlongster.com/secret-of-good-electron-apps

Also you may want to use Svelte rather than React.

I'm curious myself if the Obsidian team has anything to share about this.