Why plotting is so slow?

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Mr M.
Mr M. 2018-1-5
评论： Adam 2018-1-5
I have a matrix with size 1500x1500, and the contourplot of this matrix takes 6sec in the script (tic-toc pair around the contourf command), however after that I have to wait 63 sec to see the figure window. Why? How to do this faster? I need to save a figure. Maybe smaller pixel resolution is enough at the end.
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Adam
Adam 2018-1-5
doc profile
may help understand where time is spent, though possibly not if it is related to rendering a figure and object within it.

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