Looking at the Activity Monitor, when the compressed memory is in use (even a few MB), the changing desktop and mission control animation get slightly jerky and start stuttering. They stay that way until the system is restarted. If the compressed memory usage is 0 MB, the animations stay smooth. Some other information: I'm on a MBP 13" mid 2010 with 8GB Ram. I usually have several tabs open in Chrome all the time and the CPU usage is very low. Resetting PRAM and SMC doesn't help. Anyone else experiencing this issue?