if sys.platform[:3] == 'win':
    timefunc =time.clock
else:
    timefunc =time.time
def trace(*args): pass
def timer(func,*pargs,**kargs):
    _reps = kargs.pop('_reps', 1000)
    trace(func,pargs,kargs,_reps)
    repslist = range(_reps)
    
    start = timefunc()
    for i in repslist:
        ret = func(*pargs, **kargs)
    elapsed = timefunc() - start
    return(elapsed, ret)
def best(func, *pargs, **kargs):
    _reps = kargs.pop('_reps', 50)
    best = 2 ** 32
    for i in range(_reps):
        (time,ret) = timer(func, *pargs, _reps=1, **kargs)
        if time < best: best = time
    return (best, ret)

def trace(*args): pass

_reps = kargs.pop('_reps', 1000)