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Thomas Eckert
Thomas Eckert

Posted on • Edited on • Originally published at thomaseckert.dev

Logging Python Execution Time with a Decorator

#python #tips

Here is a decorator for logging execution time for a Python function:

from time import time def print_execution_time(function): def timed(*args, **kw): time_start = time() return_value = function(*args, **kw) time_end = time() execution_time = time_end - time_start arguments = ", ".join( [str(arg) for arg in args] + ["{}={}".format(k, kw[k]) for k in kw] ) print( "{} ms {}({})".format( str(execution_time * 1000), function.__name__, arguments ) ) return return_value return timed @print_execution_time def repeat(number, n_repeats=30000): return [number for number in range(30000)] repeat(9) repeat(20, 40000) repeat(1, n_repeats=4000)
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This will print the execution time in milliseconds and the name of the function run with its arguments:

1.001596450805664 ms repeat(9) 1.0008811950683594 ms repeat(20, 40000) 1.0001659393310547 ms repeat(1, n_repeats=4000)
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