On older Windows machines, I noticed that after you browse the web a lot and just generally use your computer extensively, things start lagging or stalling. An example is after a fresh format you click the Start button and the menu comes up immediately, but after some use of your PC, it'll take 1-2 seconds for the menu to appear.
I'm experiencing something similar in OS9. When I right click on a file it takes a bit for the menu to come up, and when I click off and try again, it's fast the 2nd time around. Another example is when I open software (even Simple Text), I see the top bar appear for 2-3 seconds but it's totally grey (like it's frozen on opening) until it finally opens. It clears up after closing it and trying again.
What could be the cause of this? I'm running on an SSD drive so I don't defragment.