Performance counter decorator

gistfile1.py

def time_and_log(func):
    """
    A decorator to call a function and log the time spent inside

    Usage:
        @time_and_log
        somefunc(someargs):
            pass
    """

    @functools.wraps(func)
    def wrapper(*args, **kargs):
        # XXX not monotonic time, needs C binding to clock_monotonic
        tstart = time.time()
        try:
            return func(*args, **kargs)
        finally:
            tend = time.time()
            LOGGER.info('%s took %f seconds', func.__name__, tend - tstart)
    return wrapper