snippets/Python-decorator-to-measure-execution-time.md

decorator to measure the execution time per line

This decorator measures the amount of time it takes to execute a function and displays a detailed summary.

from cProfile import Profile

def explain_time(f):
    def wrapper(*args, **kwargs):
        profile = Profile()
        profile.enable()
        output = f(*args, **kwargs)
        profile.disable()
        profile.print_stats()
        return output
    return wrapper

@explain_time
def test():
    d = {"a": -1}
    return d.get("a")

>>> test()
         3 function calls in 0.000 seconds

   Ordered by: standard name

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    0.000    0.000    0.000    0.000 <ipython-input-209-8a9237b67823>:11(test)
        1    0.000    0.000    0.000    0.000 {method 'disable' of '_lsprof.Profiler' objects}
        1    0.000    0.000    0.000    0.000 {method 'get' of 'dict' objects}