Optimise che theia loading time

I am using theia with che. The IDE takes a lot of time to load > 10 seconds even after using CDN and removing a bunch of unnecessary plugins. How to speed up the build and what can be done to load it as fast as https://stackblitz.com/edit/react-bzjm9y?file=src/App.js or at-least to a comparable state?
@akosyakov @vince-fugnitto @svenefftinge any suggestion for this? I am modifying generator in che theia, looks required assets are loaded before loading the vs code, can these be fetch asynchronously with monaco and file tree being present, so the user can work while the background processes are fetching the required assets?