>That being said, I too am noticing that having the cursor over the line 
>of text in that little delete window appears to speed up the deletion 
>considerably over having the cursor anywhere else. What's the logic 
>behind that, I wonder?

I'm taking a wild guess that it has to do with OS X's desire to "sleep" 
classic. I think OS X may give highest priority to any application that 
the mouse is over, figuring that the mouse will be over the front most 
application.

So when the mouse leaves an Emailer window, OS X takes processor time 
away from Emailer.

You can see the same slow down in OS versions prior to X, you just have 
to physically bring another application to the front, the watch the now 
slightly greyed window of Emailer in the background slow to a crawl. 
Although prior to OS X the slowdown was as bad, but it was still 
significant (probably again due to OS X's task sharing. In previous OS 
versions, it was up to the application to release the processor, but in 
OS X, the OS takes care of who gets what slice of processor time, so the 
slowdown would be greater as the OS takes away more processor time then 
the application would have normally given up on its own).

-chris
<http://www.mythtech.net>

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