Autocompletion takes a good few seconds. Digging into it, it seems like the Theia TypeScript Language Server might not be the best choice. Can we consider switching to something like: https://github.com/neoclide/coc-tsserver? This extension is a fork of `typescript-language-features` extension which is bundled with VSCode and is much faster. I can start working on it if this is something which might be useful. Would it be better to do it as a different LSP plugin?