Re: CPU Usage difference
Re: CPU Usage difference
- Subject: Re: CPU Usage difference
- From: Alex ROUGE <email@hidden>
- Date: Fri, 6 Mar 2009 11:41:48 +0100
I understand.
But it's still impressive that to play an audio file on a 2.4Ghz
computer we need 10% CPU. :/
Anyway, thank for your answer.
Alex
On 6 mars 09, at 11:31, tahome izwah wrote:
That's totally possible, however, it might also just be a sign of
different buffer sizes and -formats for the two devices, depending on
the hardware and drivers that they use. IOW, there might be some more
bit shuffling going on under the hood that would account for the
difference you see.
--th
2009/3/6 Alex ROUGE <email@hidden>:
Hi everybody.
Recently, while testing an home made application that requiere
CoreAudio I
found something interesting.
I'm working with a Macbook (Alu) with 4GB memory, 2.4Ghz.....
What I found is that, all application who requiere audio output
doesn't have
the same CPU usage depending if the audio output is internal
speaker or
headphone/line out.
The difference is impressive.
For instance, if we use the Finder to play an audio file :
Line out : CPU charge = 3.5%
Internal speaker : CPU charge = 10.9%
I think Apple ® is doing a software filtering to compensate very
small sized
speaker but this difference is really huge.
Can Apple ® provide more information about this behavior ?
Regards
Alex _______________________________________________
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