[Octave-bug-tracker] [bug #48736] Multiplication is thrice as fast as division

[anonymous]

Follow-up Comment #2, bug #48736 (project octave):

The computational complexity of the division operator is higher than the
multiplication operator. See the link


https://en.wikipedia.org/wiki/Computational_complexity_of_mathematical_operations
 

Further the link


https://gmplib.org/~tege/x86-timing.pdf


shows that there is about a factor of 5 difference in the number of cycles for
scalr division and multiplication.

Ok, perhaps Octave should be expanding


x /= n


as

x *= 1/n
-varbatim-

but I suspect that this would not be as accurate. What as the matlab times in
this case ?

D.



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