time your python functions

timeit.py

import time
def timeit(method):
    """Decorate methods to measure time."""

    def timed(*args, **kw):

        print 'START', method.__name__
        ts = time.time()
        result = method(*args, **kw)
        te = time.time()
        print 'STOP', method.__name__

        print 'TIME %r (%r, %r) %2.2f sec' % \
              (method.__name__, args, kw, te - ts)
        return result

    return timed