I read the VFS code, actually you made it super easy to understand a VFS here so it was hard not to look.

I feel like what we need here is a cheaper way to do block I/O from WASM. It seems like this would be a good thing to get into the browsers.

I'm going to reach out to some folks I know and see if I can get any interest on that front.

My takeaway from this is:

* the wasm is totally reasonable

* the i/o cost is onerous and it's hard to be sure what sync guarantees you're going to get

I think if your app is mostly read it's fine.