Hi Folks,
I've designed a QC composition that uses an iterator patch to iterate
thru the contents of an RSS feed and process each RSS entry (using a
Javascript patch), and then render a cube for each entry, with this
processed data determining the content of an Image with String for
the front of each Cube, and various other cube inputs (x-pos, colour
etc).
The problem I'm suffering from is terrible performance. In each frame
many patches are executing unnecessarily, since the RSS changes only
rarely, and so all the decision logic / javascript patches used to
generate inputs to each cube will evaluate to the same result.
Is there any way to prevent this unnecessary execution? What I really
need is some kind of "Latch" or cache patch that could be wired to
the "updated" output of the RSS patch, so that unless there is new
content, the cached content is provided to the cube inputs.
I found this old thread which describes the identical problem back in
2005:
http://lists.apple.com/archives/quartzcomposer-dev/2005/May/
msg00130.html
Unfortunately that thread didn't have a happy ending. I'm reposting
the problem in the hope that someone else might have devised a way
around this seemingly simple problem.
Thanks in advance for any help anyone can provide.
Cheers,
-Brendan
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