On 09/24/2010 04:46 PM, Mathieu Bouchard wrote:
On Fri, 24 Sep 2010, Matteo Sisti Sette wrote:
By the way I would also like to know the answer to the same question
in Mac. As far as I have seen, though, video with GEM seems to perform
always much worst in Mac than in Windows and Linux with any codec
(except h264 that has a big issue in linux only) - Mathieu said he
probably knew the cause of this which was not related to codecs.
What did I say ? I thought I said that if your video uses a codec which
requires more CPU than the computer with provide to the codec,
No, not that one (also interesting), I was talking about this one (which
as far as I understand is unrelated):
> does it also happen when not reading and writing video ? [...]
> Is that kind of thing slower on OSX than on Windows and/or Linux ?
> I ask because I wonder whether it can be linked with a problem
> I know about on OSX...
[...]
> What I know is that large memory allocation (128k and more) using
> the malloc() command, uses in turn the mmap() command, in a way
> that is much, much slower on OSX than on Linux.
[...]
> that's one thing for which OSX is much slower than I expected,
> and it took me a long time to find out.
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