Python big integer vs. Julia big integer arithmetic

[Benny]

@sgaure

Is python’s pow written in python, or does it dispatch to a C-routine?

pow is a builtin, and like in Julia, builtins in CPython are implemented in C.

@oOosys

The overall timing you can observe at the shell prompt does not have this disadvantage.

This is incorrect. Your shell prompt timing is running 1 call polluted by other hefty routines like IO and loading the session, which makes it susceptible to system variation and explains this paradoxical result:

@sgaure

How come it measured longer time for doing nothing than doing something, in your above python experiment?

This is the exact reason why there are dedicated timing libraries, some included in the standard library of language implementations like timeit for CPython, capable of repeating calls to account for or average out the variation.