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From "Scott A. Ruffner" <sruff...@phy.ucsf.edu>
Subject Re: Applet way too slow on MAC
Date Fri, 12 Aug 2005 19:52:22 GMT
hi, thomas, et al. --

after a lot more surfing Mac OSX/Java mailing lists,
i came across this tidbit on apple's java-dev list.
i think it might address the drastic rendering
slowdown on OSX 10.4.2.  it's worth a read:

http://lists.apple.com/archives/java-dev/2005/May/msg00498.html

there are plenty of calls to Raster.getDataBuffer() in
Batik, so perhaps this is the problem??

i did some further profiling of my app, and indeed:
59.6% of CPU time is in __memcpy(), all of which can
be traced back to calls to either "syncFromJavaPixels"
or "syncToJavaPixels" in the Apple library libawt.jnilib.

hopefully, Apple is going to address this problem soon
(the author of the above list entry kind of intimated
this might be the case...)... any thoughts?

scott
-- 
Scott A. Ruffner, Scientific Programmer/Analyst
Lisberger Lab
W.M. Keck Foundation Center for Integrative Neuroscience
University of California -- San Francisco
513 Parnassus Avenue, Box 0444, S871
San Francisco, CA  94143-0444
415-502-7897

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