How to time parts of your python code

time_some_code.rst

HowTo Time some Piece O' Code

I always forget how I should time little parts of my python code when I'm trying to optimize it, so I put it here so that I can just search for it later.

There's a bunch of timing functions in python: Some use various different clocks, but the Stack Exchange wisdom makes me want to use the timeit module.

Here's how its done

.. codeblock:: python

   from timeit import default_timer as timer

   t_0 = timer()
   # here's some code
   b = 2 + 2
   t_elapsed = timer() - t_0
   print('Elapsed time = {t:4.4f} seconds.'.format(t=t_elapsed))