Python中计算函数执行时间的五种方法

import time


def func():
    print('func start')
    time.sleep(1)
    print('func end')


t = time.time()
func()
print(f'coast:{time.time() - t:.4f}s')

import time


def func():
    print('func start')
    # time.sleep(1)
    print('func end')


t = time.time()
func()
print(f'coast:{time.time() - t:.8f}s')

import time


def func():
    print('func start')
    # time.sleep(1)
    print('func end')


t = time.perf_counter()
func()
print(f'coast:{time.perf_counter() - t:.8f}s')

import time
import timeit


def func():
    print('func start')
    time.sleep(1)
    print('func end')


print(timeit.timeit(stmt=func, number=1))

import time


def cost_time(func):
    def fun(*args, **kwargs):
        t = time.perf_counter()
        result = func(*args, **kwargs)
        print(f'func {func.__name__} cost time:{time.perf_counter() - t:.8f} s')
        return result

    return fun


@cost_time
def test():
    print('func start')
    time.sleep(2)
    print('func end')


if __name__ == '__main__':
    test()

import asyncio
import time
from asyncio.coroutines import iscoroutinefunction


def cost_time(func):
    def fun(*args, **kwargs):
        t = time.perf_counter()
        result = func(*args, **kwargs)
        print(f'func {func.__name__} cost time:{time.perf_counter() - t:.8f} s')
        return result

    async def func_async(*args, **kwargs):
        t = time.perf_counter()
        result = await func(*args, **kwargs)
        print(f'func {func.__name__} cost time:{time.perf_counter() - t:.8f} s')
        return result

    if iscoroutinefunction(func):
        return func_async
    else:
        return fun


@cost_time
def test():
    print('func start')
    time.sleep(2)
    print('func end')


@cost_time
async def test_async():
    print('async func start')
    await asyncio.sleep(2)
    print('async func end')


if __name__ == '__main__':
    test()
    asyncio.get_event_loop().run_until_complete(test_async())

import asyncio
import time


class CostTime(object):
    def __init__(self):
        self.t = 0

    def __enter__(self):
        self.t = time.perf_counter()
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        print(f'cost time:{time.perf_counter() - self.t:.8f} s')


def test():
    print('func start')
    with CostTime():
        time.sleep(2)
        print('func end')


async def test_async():
    print('async func start')
    with CostTime():
        await asyncio.sleep(2)
        print('async func end')


if __name__ == '__main__':
    test()
    asyncio.get_event_loop().run_until_complete(test_async())

import time
import eventlet#导入eventlet这个模块
eventlet.monkey_patch()#必须加这条代码
with eventlet.Timeout(5,False):#设置超时时间为2秒
  time.sleep(4)
  print('没有跳过这条输出')
print('跳过了输出')

import time
import timeout_decorator

@timeout_decorator.timeout(5)
def mytest():
    print("Start")
    for i in range(1,10):
        time.sleep(1)
        print("{} seconds have passed".format(i))

if __name__ == '__main__':
    mytest()

import time
import signal
def test(i):
time.sleep(i%4)
print "%d within time"%(i)
return i
if __name__ == '__main__':
def handler(signum, frame):
raise AssertionError
i = 0
for i in range(1,10):
try:
signal.signal(signal.SIGALRM, handler)
signal.alarm(3)
test(i)
i = i + 1
signal.alarm(0)
except AssertionError:
print "%d timeout"%(i)