import time
# 程序开始时的时间
time_start=time.time()
# 程序结束时系统时间
time_end=time.time()
# 两者相减
print('totally cost',time_end-time_start)
import time
limit = 10*100*1000
start = time.perf_counter()
while True:
limit -= 1
if limit <= 0:
break
delta = time.perf_counter() - start
print("程序运行的时间是：{}秒".format(delta))
