[Octave-bug-tracker] [bug #58445] significant slow down in stable version for cellfun invocations which use function handles

[Rik]

Follow-up Comment #11, bug #58445 (project octave):

Updating the timings after the function handle refactoring.  These times are
on the stable branch (6.0.90).


cellfun('numel'): 0.012671 secs
cellfun(@numel):  2.44392 secs


The function handle is still orders of magnitude slower, but it is also far
better than the 17.4 seconds before.

But, "numel" is one of the accelerated functions so it might be better to
compare to an unaccelerated function.  I used the same benchmark from comment
#1 but substituted sum() for numel().  Results are 


cellfun('sum'): 0.999322 secs
cellfun(@sum):  3.2546 secs


So, for some reason it is still 3X slower to use function handles rather than
strings.



    _______________________________________________________

Reply to this item at:

  <https://savannah.gnu.org/bugs/?58445>

_______________________________________________
  Message sent via Savannah
  https://savannah.gnu.org/