[PD] GEM: abnormal performance difference PC/Mac?

[Pagano, Patrick]

Maybe it's the codec? 

-----Original Message-----
From: pd-list-bounces at iem.at [mailto:pd-list-bounces at iem.at] On Behalf Of Matteo Sisti Sette
Sent: Thursday, April 08, 2010 4:49 PM
To: PD list
Subject: [PD] GEM: abnormal performance difference PC/Mac?

Hi,

I'm working on a patch that has 16 [pix_film]s each one playing back a 
short loop of video; videos are approx 400x700 size, encoded with 
Animation and have an alpha channel.

On a PC with a 2.5GHz dual core (T9300) and Windows, it _almost_ works 
smoothly: with 10-12 videos it is just fine.

On a MacBook Pro which has a 2.4GHz dual core it is _much_ slower. Even 
with only 4 or 5 videos playing, it goes at less than half of the 
intended 25fps.

Can the hardware really explain that much difference in performance? Is 
an intel T9300 that much more powerful than the processor of a MacBook 
pro? (certainly not because of the 0.1GHz more)? Or the GPU (Nvidia 
GeForce 9500M GS)?

Or is there some "software" reason for such a huge performance penalty 
on Mac OS??


thanks
m.

-- 
Matteo Sisti Sette
matteosistisette at gmail.com
http://www.matteosistisette.com

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