Excessive "Cleaning Up" - 2010, MR

[DanGrover]

Hi guys,

I have a quick question. I have a scene that's taking a looooong time (as in well over 30 seconds - ok, so not that long, but far, far longer than normal) during the "cleaning up" stage at the end of a render. This is a bit frustrating because I'm doing some tests right now and so usually end up cancelling the render after about 20 seconds, after I've seen what I want to see. So I end up having to wait an extra 30-60 seconds whilst it's seemingly doing nothing.

 

This doesn't ususally happen, so I'm wondering if anyone knows what might cause this (or, indeed, what it's doing) so I can see if I can reduce it a bit?

 

Thanks!