0b8fa710-431b-408d-a2f0-e89fe3460762 9 4 5 decimal

&[DATE] &[TIME] - &[FILENAME]

Generate a random array

4 appVersion 0.99.7691.4821 ≡

RND 5050 Random :

and simple two test function

M f M norme 11 line :

M g M norme M norme 21 line :

A RND :

to 0 time :

A f 28.9729

0 time to - 0.937 s *

Two questions:1) Why are different?2) Why g is always faster than f?

to 0 time :

A g 28.9729

0 time to - 0.936 s *

Well, are different because A isn't parsed as a true numeric array. Using eval now are the same:

A RND eval :

to 0 time :

A f 28.9729

Remains the second question. 0 time to - 0.983 s *

to 0 time :

A g 28.9729

0 time to - 0.937 s *

eval() allows parsing 'A' as a numberic entity, and can't do nothing for speed up a procedure involving A. NDTM Amarasekera shows that's false. Here is an example.

Collect/assogn 'M' is faster => Mo h' M Mo : m M 1 el : 12 mat k 2 M length range m M k el ≤ m M k el : continue if for m 31 line :

... than free demand 'M" M h mm M 1 el : k 2 M length range mm M k el ≤ mm M k el : continue if for mm 31 line :

Bolean does not like floating point B RND 4 round vectorize eval :

to 0 time :

B h' 0.9996

0 time to - 1.1 s *

to 0 time :

B h 0.9996

0 time to - 12.8 s *

Alvaro