usable stackless

所谓士别三日当刮目相看，有一段时间没有注意看 StacklessPython 的邮件列表了，没想到现在 sandbox 中已经有了这么多有意思的代码了 ^_^ 。 最有意思的莫过于 examples/stacklesssocket.py 了，只要把标准库中的 socket 替换成stacklesssocket，然后使用 urllib 就自动成为异步的和StacklessPython兼容的。演示程序如下(摘自StacklessPython邮件列表)：

import sys
import stacklesssocket
import stackless

sys.modules["socket"] = stacklesssocket

import urllib
import time

def download(uri):
    t1 = time.time()
    f = urllib.urlopen(uri)
    s = f.read()
    t2 = time.time()
    print "Downloaded", uri, "in", "%.1f" % (t2-t1), "seconds"
    return t2-t1


print " === Serial === "
t1 = time.time()
download("http://www.stackless.com/wiki/Tasklets")
download("http://www.stackless.com/wiki/Channels")
t2 = time.time()
print " --->", t2-t1

print " === Parallel === "
t1 = time.time()
stackless.tasklet(download)("http://www.stackless.com/wiki/Tasklets")
stackless.tasklet(download)("http://www.stackless.com/wiki/Channels")
stackless.run()
t2 = time.time()
print " --->", t2-t1

效果：

% spython async_fetch.py
 === Serial ===
Downloaded http://www.stackless.com/wiki/Tasklets in 2.6 seconds
Downloaded http://www.stackless.com/wiki/Channels in 2.7 seconds
 ---> 5.34717988968
 === Parallel ===
Downloaded http://www.stackless.com/wiki/Channels in 4.0 seconds
Downloaded http://www.stackless.com/wiki/Tasklets in 5.4 seconds
 ---> 5.43875193596

% spython async_fetch.py
 === Serial ===
Downloaded http://www.stackless.com/wiki/Tasklets in 2.6 seconds
Downloaded http://www.stackless.com/wiki/Channels in 2.7 seconds
 ---> 5.32963705063
 === Parallel ===
Downloaded http://www.stackless.com/wiki/Channels in 2.2 seconds
Downloaded http://www.stackless.com/wiki/Tasklets in 2.7 seconds
 ---> 2.71087312698

还有 examples/threadchannels.py ，examples/threadscheduling.py 演示了 Stackless 如何与多线程一起使用！ 还有更新过的 uthread 模块：libraries/uthread-ccp/uthread.py，这可是大名鼎鼎的 EVE-online 用到的东西哦 ^_^ 有时间再好好研究研究这些东西吧!