I run 10000 times just to reduce the randomness of the model. I find that when I run just few times (about 3 times), the runing time several times longer than the normal runing time, so I run 10000 times and abandon the first 50 times to obbtain a more accurate time. But as shown on the code, the flops of time1 and time2 are identical, but the runing time of these two function is different, I don’t know what brings additional time cost ?