I am pretty much upgrading to every EAP build that comes out, and I noticed that after upgrading to a build that was released before 7.0.3 (I don't remember which one exactly), the editor became quite slow. In particular scrolling became much slower. For instance, a "page down" used to instantaneous, but it now takes maybe half a second.
I am on Mac, and changed the default font for the editor; not sure if this can be related to the issue I am seeing. Any advice would be appreciated.