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threading基础实例

22 Sep 2015

1. Two example of run task with threading and not

1.1 First: without threading

import threading
import time

def task():
    print 'worker'
    time.sleep(1)          # 任务很简单，打印单词，然后sleep 1s

if __name__ == "__main__":
    start = time.time()
    for i in range(5):
        task()
    print time.time() - start          # 这里统计执行时间

result

python thread_no.py
worker
worker
worker
worker
worker
5.05284118652             # 能明显感觉出1秒的sleep时间

1.2 Second: with threading

import threading
import time

def task():
    print 'worker'
    time.sleep(1)

if __name__ == "__main__":
    start = time.time()
    for i in range(5):
        t = threading.Thread(target = task)
        t.start()     # 与上面的区别仅仅是这里做了thread处理
    print time.time() - start

result

python thread.py
worker
worker
worker
worker
worker
0.0138309001923            # 结果瞬间出现，用时很短