Photoshop cs6 slow

Question

since upgrading to Mountain Lion OS X, everything I click on I get the loading wheel? I haven't used photoshop since

Answer 1

hmm, so played around a little bit with Activity Monitor and it looks like Photoshop when it saves is duplicating the current open file in memory and then not giving the ram back upon save complete.
For example.
Test 1 (small file)
I open file A. Ram usage goes to 900mb.
I create an empty layer in file A and hit save
ram jumps to 1.8gb and stays at 1.8gb until I completely shut photoshop down
Test 2 (large file)
I open file B. Ram usage goes to 2.5gb
I create an empty layer in file B and hit save
ram jumps to 5gb (and stays)
Test 3 (smart object, save and re-open then save again)
I open file B. Ram usage goes to 2.5gb.
I merge all open layers into a new smart object. Ram goes to 5gb.
I hit save and ram goes to 5.2gb.
I close photoshop ram goes back down to 0
I open file B again usage goes to 1gb. (1 smartobject layer must be much more efficient)
I create a new empty layer and save. Ram jumps to 2gb.
(Note when I refer to ram above, I am refering to the amount of ram Activity Monitor is reporting as being used by Photoshop)
Interestingly enough if I create a second empty layer and save again the ram still goes up but only by about 200mb in both cases.
Lightroom seems to be for the most part uneffected mostly sitting at about 900mb. Right when the save completes it bumps up to 1.2gb for a few seconds then right back to 900 (presumably updating the new thumbnail). Also right when the save finishes Lightroom grabs almost my entire CPU power for a few seconds, which likely isn't a big issue, but also worth noting.
Other than Lightroom's little surge CPU stays relatively low the whole time. Photoshop mostly staying under 5%, usually closer to 1%.