[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.