Speed of function vs lambda calls in python

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SUMMARY

The discussion centers on the performance comparison between function calls and lambda expressions in Python. It highlights that defining a lambda function inside another function (e.g., redefining lambda f in each iteration of g) results in slower execution times. The consensus is that moving the lambda definition outside the function body significantly improves performance. This aligns with insights from a related Stack Overflow discussion, which indicates that the execution time difference is negligible when lambdas are used correctly.

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ergospherical
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An observation I made earlier- something like
Python:
def f(...):
    ...
    return ...

def g:
    ... = f(...)
was quite a bit slower than doing
Python:
def g:
    f = lambda ... : ...
    ... = f(...)
any reasons why?
 
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ergospherical said:
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.
 

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