Application CPU percentage...

[Bill Bumgarner]

On May 29, 2007, at 5:35 PM, Charles E. Heizer1 wrote:
> OK, so I assigned the Key Equiv. \R Return to my button and now my  
> app seems
> to use anywhere from 8 to 10 percent CPU. This seems a bit high. Is  
> there
> something I can do?

Without seeing the code and understanding the problem at hand, not  
much the list can do to help you here other than suggest you use the  
performance tools included with the developer tools to go figure out  
where your CPU cycles are going.

Now -- if you are watching the output of top or Activity Monitor, keep  
in mind that hitting a button is going to use a LOT of CPU for a very  
short amount of time as the button tracks the event and, thus, all the  
different states have to be drawn.   This will be on top of whatever  
CPU is being consumed by your app in response to the button hit.     
However, it is likely using 8% or 10% for a very short amount of time  
-- much less time than the sampling granularity of AM or top and,  
thus, it shows as 8% or 10% for longer than it really is.

In any case, that much CPU for a button hit -- for actively responding  
to a user action -- isn't a problem unless it is sustained.

b.bum