If you look at the video showing how it works, you will see, that it apparently starts displaying file content, while you navigate over files and directories. I

If you look at the video showing how it works, you will see, that it apparently starts displaying file content, while you navigate over files and directories. I think this is what happens asynchronously, in order to never block the ability to navigate. I am not sure I am a fan of this, because I don't actually need everything to start being rendered. Maybe rendering something when I press a specific button would be good enough and that wouldn't necessarily require async stuff.