[PD] a really fast-to-read codec in linux?

[Matteo Sisti Sette]

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.