python 加速简单的程序dask

• 一个简单的for循环：

import time
from time import sleep
from dask import delayed

def inc(x):
    sleep(1)
    for i in range(100):
        x+=i
    return x+1
def add(x,y):
    for i in range(100):
        x+=i
        y+=i
    return x+y

def no_delay():
    x = inc(1)
    y = inc(2)
    z = add(x, y)
    print(z)

def delay():

    x = delayed(inc)(1)
    y = delayed(inc)(2)
    z = delayed(add)(x, y)
    # print(z)
    print(z.compute())

if __name__ == '__main__':
    t1=time.time()
    no_delay()
    t2=time.time()
    print("no_delay time:",t2-t1)

    # z.visualize()
    t3 = time.time()
    delay()
    print("delay time:",time.time()-t3)
    # print(time.time()-t1)
  # 结果：
  19805
no_delay time: 2.010301113128662
19805
delay time: 1.0089519023895264

• 可以看出一个简单的程序达到了两倍的速度，甚至快于多线程多进程
• 原理待补充，其他应用待补充