What does the map_cache?

[ClaryXII]

What is it doing? Why it fckes my maps up and why it keeps comming back when I delete it?

[FlawlessHappiness]

It's use is to decrease loading times between maps.
Which means it's for finished maps, and not the undergoing production of maps.

If I remember correctly you can disable ForceCacheLoading if you follow the guide on Setting up the Development Environment.

[Mudbill]

If I remember correctly, I have experienced getting generated .map_cache files even with ForceCacheLoading toggled. I suspect that, despite it, it will generate the files but not use them, because I've had no cache issues regardless. Either that or I'm derping.

[ClaryXII]

So I have to keep deleting them untill Im finished?

[FlawlessHappiness]

So I have to keep deleting them untill Im finished?

As Mugbill said:

it will generate the files but not use them, because I've had no cache issues regardless. Either that or I'm derping.

If it won't use it, you won't have to delete it. Just don't mind them.