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R2014a slower than R2013a

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Pinpress
Pinpress on 18 Jun 2014
Closed: MATLAB Answer Bot on 20 Aug 2021
On the same computer, when running imdilate, R2014a takes 4.1 sec while it was 3.7 sec on R2013a. this is consistent after multiple runs.
se = strel('ball', 4, 4, 4);
bw = imdilate(im, se); % size of im: 512*512*375
Also, why imdilate returns a new matrix with min and max value of 4 and 5, respectively, instead of anticipated 0 or 1??

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