Speed of function vs lambda calls in python

[ergospherical]

An observation I made earlier- something like

def f(...):
    ...
    return ...

def g:
    ... = f(...)

was quite a bit slower than doing

def g:
    f = lambda ... : ...
    ... = f(...)

any reasons why?

 

[scottdave]

How much slower does it run? Is this over several iterations?

You might find this discussion on stackoverflow relevant. According to that, there is negligible difference in execution times.

https://stackoverflow.com/questions/26540885/lambda-is-slower-than-function-call-in-python-why

 

[PeterDonis]

any reasons why?

You're redefining the lambda $f$ in every iteration of $g$. Put the lambda definition of $f$ outside the body of $g$ and see what happens.