I've been using Adobe CS5 for a little over two years. I have a 2012 Macbook Pro.
I am working on a freelance project for a big client. In the last 48 hours or so the processing speed of the project has been getting slower and slower. The rest of my computer's processing is fine, it is only when I try to do anything in Premiere in this one specific project. It is now to the point where I can't really do anything in the project.... If I try to make an edit (for example, trimming a clip, adding a cross dissolve, changing the scale of a clip, etc.), what should take less than 1 second to process can take anywhere from 30 seconds to a few minutes. This is obviously highly abnormal.
I can't figure out why it is doing this. I have some pretty big files in the project, but I doubt it making it slow down this much.