Hey PDers,
With all these discussions about performance, I was wondering if anyone has played around with "reference" patches that could be used for the sake of profiling. Would that be a useful thing, to come up with a patch or a suite of patches that give PD a general, typical (if there could possibly be such a thing) workout?
I believe chris clepper said this around Tue, 12 Nov 2002:
However, the performance of Aqua Tcl/Tk doesn't help things, either. Controls like number boxes cause a bunch of screen-redraw interrupts that are themselves greedy. Part of it is apparently AquaTk canvasses still use QuickDraw.
quickdraw should be ok as long as they don't pile on the CopyBits which has become dog slow in OSX due to the double buffering. i wonder how many buffers each graphic object has using the wish shell? one for tcl/wish + 2 for quartz?
Errr, I honestly couldn't tell you. Some time asking on the Tcl-Mac list tcl-mac@lists.sourceforge.net would probably get you somewhere. They're a helpful bunch.
I think there's a lot still to be optimized in the MacOSX port, though, both in user experience and in performance. Chris Clepper wrote recently about compiling with different optimization settings. Might be worth a bit of experimentation...
the -03 compiler setting gave slightly better performance but nothing truly remarkable. if i recall one of the main differences between gcc -02 and -03 was the unrolling of loops??
That's about the size of it, as -O2 does optimizations where there isn't a size-speed tradeoff, and -O3 does. I've noticed some places where Miller has hand-unrolled stuff in the code, anyway.
Cheers, adam
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