Python 测量 n 次重复后循环中的增量时间

Question

拜托，我需要帮助 :) 我在 python 中有一个较长的周期，我想测量每 1000 次迭代的周期总时间以及最后 1000 次迭代之间的时间（我的意思是 1000 和 2000 之间的差异循环迭代）。

测量从我开始调用 delta 开始的总时间和调用 d2

的 1000 次迭代之间的时间的变量

start = time.time()
for i in range (0, iterations):
# ... logic in cycle ...
# calculating delta in each iteration
delta = time.time() - start
# Measuring time after every 1000 iterations
if (i + 1) % 1000 == 0:
    # Calculating  d2 time
    d2 = time.time() - start - d2
    print (str(i + 1) + ' items in ' + time.strftime("%H:%M:%S", time.gmtime(delta)) + ' (' + time.strftime("%H:%M:%S", time.gmtime(d2)) + ')' )

# After cycle
end = time.time() - start
print ('Total time: ' + time.strftime("%H:%M:%S", time.gmtime(end)))

结果如下：

1000 items in 00:00:07 (00:00:07) 2000 items in 00:00:13 (00:00:06) 3000 items in 00:00:20 (00:00:13) 4000 items in 00:00:27 (00:00:13) 5000 items in 00:00:34 (00:00:20) 6000 items in 00:00:41 (00:00:20) 7000 items in 00:00:48 (00:00:27) 8000 items in 00:00:55 (00:00:27) 9000 items in 00:01:01 (00:00:34) 10000 items in 00:01:08 (00:00:34) 11000 items in 00:01:15 (00:00:41) 12000 items in 00:01:22 (00:00:41)

似乎在第一个值中没问题（在第二行中 7 秒和 13 秒之间的增量没问题）但后来这个时间正在消散和混乱。看最后两行。 00:01:08 和 00:01:15 之间的差值约为 7 秒（如前两行），而不是 41 秒。还有最后一行...

哪里有问题？有什么想法吗？

我很乐意提供任何提示或帮助。非常感谢

此致

Answer 1

您还必须在每第 1000 个周期更新您的 d2。为了清楚起见，我将旧的增量命名为 old_delta。

import time

iterations = 5000
start = time.time()

old_delta = 0
for i in range(0, iterations):
    time.sleep(.002)
    # ... logic in cycle ...
    # calculating delta in each iteration
    delta = time.time() - start
    # Measuring time after every 1000 iterations
    if (i + 1) % 1000 == 0:
        # Calculating  d2 time
        d2 = delta - old_delta
        print(str(i + 1) + ' items in ' + time.strftime("%H:%M:%S", 
    time.gmtime(delta)) + ' (' + time.strftime("%H:%M:%S", time.gmtime(d2)) 
    + ')' )
        old_delta = delta


# After cycle
end = time.time() - start
print ('Total time: ' + time.strftime("%H:%M:%S", time.gmtime(end)))

Python 测量 n 次重复后循环中的增量时间

Python measuring delta time in cycle after n-repeating

python

time

measurement

cycle