Update metadata of new content

[elephantLYFE]

So either have a process churning away ALL the time (even when you don't need it) or run from the GUI (which seems to do not much of anything when I try it).  I would like to be able to tell the system I changed or added files in a particular location so it could check just those.

I'm not aware of the underhood workings, or the amount of resources used for it.
but Real time monitoring of file changes works just fine for me, and i have not issue of resources on my setup.

Best Guess,
I don't imagine its doing a full scan continuously,
but rather some how detecting changes,
and then doing a scan on those changes.
A dev could probably speak more of to this.