Why is zip slower than `~`?

Question:Why is zip slower than `~`?

Posted: sursumCorda 1099 Product: Maple 2023

March 16 2023

For two nonempty lists (of the same length),

F~(list1, ` $`, list2); # space-dollarsign

is (almost) equivalent to

zip(F, list1, list2);

However, it appears that in practice, using `~` can be faster than its equivalent zip version.
Here is a typical test:

restart;

>	x := combinat:-randperm(10^7): y := combinat:-randperm(10^7):

>	undefine(f);

memory used=0.62GiB, alloc change=1.21GiB, cpu time=51.35s, real time=14.77s, gc time=42.55s

memory used=0.52GiB, alloc change=-4.00MiB, cpu time=53.88s, real time=16.25s, gc time=44.51s

(1)

But I cannot find any explanations in the documentation (as well as What is Maple's equivalent to Mathematica's MapThread?). Does anyone know why?

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