[mohsen1]

Yarn, pnpm, webpack all have solutions for this. Great to see this becoming a standard. I have a project that is severely handicapped due to FS. Running 13k tests takes 40 minutes where a virtual file system that Node would just work with it would cut the run time to 3 minutes. I experimented with some hacks and decided to stay with slow but native FS solution.

What I really want is a way of swapping FS with VFS in a Node.js program harness. Something like

     node --use-vfs --vfs-cache=BIG_JSON_FILE 

So basically Node never touches the disk and load everything from the memory

[Normal_gaussian]

The way to do this today is to do it outside of node. Using an overlay fs with the overlay being a ramfs. You can even chroot into it if you can't scope the paths you need to be just downstream from some directory. Or, just use docker.

[mohsen1]

making that work cross platform is pure pain

[skydhash]

What are the other OS? There's a bunch of solutions described on Wikipedia

https://en.wikipedia.org/wiki/List_of_RAM_drive_software

[Normal_gaussian]

yes and no. Waiting 40mins for every test run is pure pain, platform specific ramfs type mounting is quite scriptable. Yes some devs might need to install a dependency, but its not a complex script.