Python计算程序运行时间

方法1

import datetime

def func(arg):
#print(arg)
if arg == 1:
return 1
else:
result = arg+func(arg-1)
#print("-->>",result)
return result

last_time = datetime.datetime.now()
ret = func(990)
print("阶乘结果:",ret)
current_time = datetime.datetime.now()
print("耗时： {}".format((current_time-last_time).seconds))

import datetime

def func(arg):
#print(arg)
if arg == 1:
return 1
else:
result = arg+func(arg-1)
#print("-->>",result)
return result

last_time = datetime.datetime.now()
ret = func(990)
print("阶乘结果:",ret)
current_time = datetime.datetime.now()
print("耗时： {}".format(current_time-last_time))

方法 2

import time

def func(arg):
#print(arg)
if arg == 1:
return 1
else:
result = arg+func(arg-1)
#print("-->>",result)
return result

last_time = time.time()
ret = func(990)
print("阶乘结果:",ret)
current_time = time.time()
print("耗时： {}".format(current_time-last_time))

方法3

import time

def func(arg):
#print(arg)
if arg == 1:
return 1
else:
result = arg+func(arg-1)
#print("-->>",result)
return result

last_time = time.clock()
ret = func(990)
print("阶乘结果:",ret)
current_time = time.clock()
print("耗时： {}".format(current_time-last_time))

总结