python--gevent

import gevent
from gevent import monkey
monkey.patch_all()
import time



def func(n):
    time.sleep(3)
    print(n)

st_time = time.time()

gevent.joinall([
    gevent.spawn(func, 1),
    gevent.spawn(func, 2),
    gevent.spawn(func, 3),
    gevent.spawn(func, 4),
    gevent.spawn(func, 5),
    gevent.spawn(func, 6),
    gevent.spawn(func, 7),
])

end_time = time.time()

print("总耗时：", end_time - st_time)
‘‘‘
1
2
3
4
5
6
7
总耗时： 3.0030035972595215
‘‘‘

import gevent
from gevent import monkey
from gevent.pool import Pool
monkey.patch_all()
import time



def func(n):
    time.sleep(3)
    print(n)

pool = Pool(10)

st_time = time.time()

gevent.joinall([pool.spawn(func, n) for n in range(50)])

end_time = time.time()

print("总耗时：", end_time - st_time)
‘‘‘
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
总耗时： 15.011604309082031
‘‘‘

# 由于池子最多可以容纳10个协程，可以看到每隔三秒打印10个数字，因此总用时15秒