[Octave-bug-tracker] [bug #53794] ishold(hax) is slow when an axis handle is passed in because of ancestor() routine

[Dan Sebald]

Follow-up Comment #1, bug #53794 (project octave):

The attached changeset should make the cost of ishold(hax) compared to
ishold() about 40% rather than roughly 300%.

Before:


>> plot(1:50)
>> tic; hax = gca(); for i=1:10000; ishold(hax); endfor; toc
Elapsed time is 8.71327 seconds.


After:


>> plot(1:50)
>> tic; hax = gca(); for i=1:10000; ishold(hax); endfor; toc
Elapsed time is 4.28007 seconds.


(file #44063)
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Additional Item Attachment:

File name: octave-ishold_axes_handle_speedup-djs2018apr30.patch Size:1 KB


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