[Octave-patch-tracker] [patch #8134] Speed up waitbar () by caching axes and patch handles in figure's __guidata__.

[Philipp Kutin]

Follow-up Comment #4, patch #8134 (project octave):

By the way, my comment regarding set() is because when I profiled the test
loop[1], it showed up topmost. (About 50% IIRC, which is consistent with
results below.) But the situation is more complicated that this:

After

> w = waitbar(0);
> p = get(w, '__guidata__')(2)


here are two different loops:


> tic; for i=1:1000, set (p, "xdata", [0; 0.5; 0.5; 0]); end; toc
Elapsed time is 0.02628 seconds.
> tic; for i=1:1000, set (p, "xdata", [0; i/1000; i/1000; 0]); end; toc
Elapsed time is 8.736 seconds.


So maybe in the first one, there's some did-not-update optimization going on?

[1] When the profiler still worked, that is. I don't think the breakage is
related to my profexplore patch, since passing it "profile('info')" makes it
assertion-fail, too.


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