[lelanthran]

> What about asking the OS for the list of changes like Everything on Windows does

That's not, the last time I checked, how everything on Windows works.

Windows provides the ability to hook into FS system calls, so that things like virus scanners work.

Everything uses the hook to get notified of all changes, and uses those mods simply to update its index (which is faster than scanning a file for viruses, so it's imperceptible to users).

It's a great idea, and I don't think there is anything similar in Linux or BSD (inotify isn't the same thing, AFAIK, it uses up file descriptors).