Python - Easy execution timer?

Question

What is best way to check execution time? I just use the perf_counter from time module.

from time import sleep, perf_counter

start = perf_counter()
sleep(1) 
finish = perf_counter()

if round(finish-start, 2) > 0:
    print(f"Finsished in {round(finish-start, 2)} (s)")

Answer 1

Most people mean CPU time when they say "execution time" and for that you would use time.process_time() . In your case, however, where all you are doing is sleeping between two consecutive calls, it would produce for the second call a return value of approximately 0. If you want elapsed time and are rounding to 2 places, I wouldn't think it would matter if you are using time.time or time.perf_counter . But perf_counter provides the higher resolution when you do care about that.

import time

t0 = time.time()
t0a = time.perf_counter()
t0b = time.process_time()
time.sleep(1)
t1 = time.time()
t1a = time.perf_counter()
t1b = time.process_time()
print(round(t1 - t0, 2), round(t1a - t0a, 2), t1b - t0b)

Prints:

1.0 1.0 0.015625