parallel processing - Anonymous Functions Dont Work inside parfor loops in matlab? -
i'm not sure if found matlab bug or doing wrong, seems calling anonymous functions inside parfor loop slow down (even slower serial performance)
is correct?
see code:
tic; parfor i=1:6, min(randn(10000000,1)); end; toc tic; i=1:6, min(randn(10000000,1)); end; toc
parallel elapsed time 0.510345 seconds.
serial elapsed time 0.932137 seconds.
same thing except using anon function:
q = @(x) min(randn(10000000,1)); tic; parfor i=1:6, q([]); end; toc %parelel tic; i=1:6, q([]); end; toc %serial
parallel elapsed time 4.208346 seconds.
serial elapsed time 0.933594 seconds.
Comments
Post a Comment