Pretty slow on my machine, too (flips between 19>21fps and 30fps).
MacBook Pro 3.06GHz
GeForce 9400M
MacOS X 10.6.1
I was starting to think that Iterator performance was slow, too, actually, from other experiments, though I haven't done any formal tests. It's disappointing though- I had hoped that Iterator performance was one of the things that might have been sorted out in QC 4.
a|x
--- On Wed, 4/11/09, Christopher Wright <email@hidden> wrote:
> From: Christopher Wright <email@hidden>
> Subject: iterator performance
> To: "quartzcomposer-dev list list" <email@hidden>
> Date: Wednesday, 4 November, 2009, 19:48
> <puts on asbestos suit ;)>
> I'm finding a lot of cases where iterator performance in
> QC4 is dramatically worse than in QC3 (typically about half
> as fast).
>
> (this does a 50x50 grid, with
> half the sprites disabled, so it's 2500/2 = 1250 sprites per
> frame -- MacBook can render this at 60fps in Leopard,
> MacBook Pro is struggling to hit 30fps in Snow Leopard.)
>
> (this one's iteration count
> is cranked up really high, but it's still ~5fps on my
> MacBook 1.83GHzGMA950 running 10.5.8, and only 2.2-2.5fps on
> my MacBook Pro 2.4GHz 8600M GT running 10.6.x (the MacBook
> on Snow Leopard also hits about 2.5fps, so the same machine
> is half as fast in iterators). Turning down the
> iteration count makes it scale up, with 10.5 always running
> about 2x as fast as 10.6).
>
> Is this expected? Does anyone else experience this
> kind of performance? Are there cases where iterators
> are actually faster (or at least as fast) on Snow
> Leopard? I'm only seeing a few cases where having all
> consumer subpatches get disabled causes snow leopard's
> iterator to skip work (unlike leopard's). Should I
> file a bug for this?
>
> --
> [ christopher wright ]
> email@hidden
> http://kineme.net/
>
>
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