Why is Safari using 91% of a CPU when it's in the background!?!

Moof1904

macrumors 65816
Original poster
May 20, 2004
1,023
28
WTF? Why is Safari using 91% according to the Activity Monitor and to top it off, Safari has only one window open and it's in the background?!?!? (The one window, btw, was Mac Rumors.)
 

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MK2007

macrumors regular
Aug 31, 2007
121
0
How long was it at 91%? When you doing nothing Safari should be at 0.00%.
 

Moof1904

macrumors 65816
Original poster
May 20, 2004
1,023
28
It was in the background while I was away from the computer. I returned to hear my fans running (Dual 2.5 G5), launched Activity Monitor and saw that Safari, sitting idle in the background on the MacRumors Forums page (no other windows open) was running at 91%. I started this thread, posted the thread, and when I next looked, Safari was behaving itself again. I look while I'm typing this and it's occasionally jumping up to 6% or 7%, but nothing unreasonable.