I don't know what's happening but I find that when using either Illustrator CC or InDesign CC they both slow down to a crawl as I am using them over the period of maybe an hour or so. The only way to fix it is to restart the app and then it's flying again for another hour until i can't bare it antmore.
When they slow down, even clicking on somthing takes a few seconds for it to respond and it's completely unworkable.
Any solution would be great, I never had this issue with any of the other Creative Suite apps before.
I am using a Mac Pro with 16GB of Ram and usually close down all other apps to insure it's not a memory issue.
Thanks!