[Octave-bug-tracker] [bug #46830] Multiplication about 4x slower than Matlab

[Philip Nienhuis]

Follow-up Comment #9, bug #46830 (project octave):

On that same old Intel core i5 box (comment #5) with 8 GB RAM (under
Windows):

Octave-8.0.0 crossbuilt a few days ago:

>> a = rand (1.5e4);
>> tic; a * a; toc
Elapsed time is 43.5511 seconds.
>> tic; a .* a; toc
Elapsed time is 0.8874 seconds.


and Matlab r2020b:

>> a = rand (1.5e4);
>> tic; a * a; toc
Elapsed time is 35.929964 seconds.
>> tic; a .* a; toc
Elapsed time is 2.608581 seconds.


so Octave's speed hasn't changed much.
Why Matlab is now so much slower for element-wise multiplication is beyond me
but maybe not that interesting.




    _______________________________________________________

Reply to this item at:

  <https://savannah.gnu.org/bugs/?46830>

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