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[Octave-bug-tracker] [bug #53845] Octave too slow when plotting large ar


From: Ray Patel
Subject: [Octave-bug-tracker] [bug #53845] Octave too slow when plotting large arrays with QT graphics toolkit (MXE Octave)
Date: Tue, 11 Sep 2018 12:25:09 -0400 (EDT)
User-agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.81 Safari/537.36

Follow-up Comment #14, bug #53845 (project octave):

(ver421 seems 2x faster than ver 441 for repeated plots after first, but its
in the noise)
Including the opengl32.dll workaround and tested with a 480x640 uint8 BW image
on Win7 Pro Intel i7 32Gb Nvidia Quadro M2000M;
  pic1=imread('001183.png');
  tic;imshow(pic1);toc
Results:
Octave421 1st 'imshow' in 0.8sec, thereafter consistently at 0.15sec for
repeats
Octave441 1st 'imshow' in 0.4sec, thereafter consistently at 0.33sec for
repeats.
...
Thank you for supporting Octave!

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