Task

Write a program which uses a timer (with the least granularity available
on your system) to time how long a function takes to execute.

Whenever possible, use methods which measure only the processing time used
by the current process; instead of the difference in system time
between start and finish, which could include time used by
other processes on the computer.

This task is intended as a subtask for Measure relative performance of sorting algorithms implementations.




import sys, timeit
def usec(function, arguments):
    modname, funcname = __name__, function.__name__
    timer = timeit.Timer(stmt='%(funcname)s(*args)' % vars(),
                         setup='from %(modname)s import %(funcname)s; args=%(arguments)r' % vars())
    try:
        t, N = 0, 1
        while t < 0.2:            
            t = min(timer.repeat(repeat=3, number=N))            
            N *= 10
        microseconds = round(10000000 * t / N, 1) # per loop
        return microseconds 
    except:
        timer.print_exc(file=sys.stderr)
        raise
 
from math import pow
def nothing(): pass
def identity(x): return x