A Python function wrapper which in Python 3.3+ uses the most accurate timing measurements

timeit.py

# Original honor: http://stackoverflow.com/a/15136358/1503549
import time



def timeit(f):
    def decorated_function(*args, **kw):
        # Time execution
        starttime = time.perf_counter()
        result = f(*args, **kw)
        endtime = time.perf_counter()

        # Report result
        print('func:{}():\n\targs={}\n\tkwargs={}\n\t'
              'took: {:.4f} sec'.format(f.__name__, args, kw, endtime - starttime))

        return result
    return decorated_function
    
# Usage 1:
@timeit
def foo():
    time.sleep(2)
    return

# Usage 2:
foo = timeit(foo)