because i am too lazy to write it everytime again

Python_timer_context manager.py

from time import time as now, sleep
class Timer:
    def __init__(self, msg=None, times=1):
        self.times = times
        self.msg = msg
    
    def __enter__(self):
        self.start = now()
        return self

    def __exit__(self, *args):
        needed = now()
        needed -= self.start
        if self.msg:            
            print("%s needed %.4f for %i calls. %.2f calls per second. %.7f per call" % (
                self.msg, needed, self.times,
                self.times / max(needed, 0.000000001),
                needed / self.times,                
            ))
        self.needed = needed