[Arkshine]

I remember starting something like that I've never finished.
If you want make this useful, just listing is not really helpful. The whole point of checking inside precached list is to see what is responsible to precache what files. It could be a pawn plugin, an amxx module or a metamod plugin. Having an global overview of this will help you to understand from where you could optimize, in the meaning reducing precache count, depending the map.
Basically to make this useful, you need to retrieve full details of everything.

"Unprecaching" is welcomed too, but this requires you filter things a bit more, because yes, you know when an entity is about to be created and you can block that. There are a lot of things you can do around that.

You should really study more the game and such.