python 多线程 - Cpython, Jython 和 IronPython的多线程性能初步比较

（免责声明：本例并不一定典型，请勿上纲上线）

写了个简单的代码想比较下哪个解释器的多线程执行效率比较高……代码如下：

 

'''
Created on Dec 13, 2012

@author: festony
'''

import random
import threading
from cj_lib import *

def test(repeat):
for i in range(repeat):
random.random()

@rec_proc_time('single thread')
def run_test_1():
test(5000000)

@rec_proc_time('multi thread - threading')
def run_test_2():
ths = []
for i in range(10):
ths.append(threading.Thread(target=test,args=(500000,)))
for i in range(10):
ths[i].start()
for i in range(10):
ths[i].join()

run_test_1()
run_test_2()

分别使用Cpython, Jython和IronPython解释执行，结果如下：

CPython：

Function {single thread} process time: 0.74492 sec(s)
Function {multi thread - threading} process time: 1.34382 sec(s)

 

Jython：

Function {single thread} process time: 3.05519 sec(s)
Function {multi thread - threading} process time: 1.37505 sec(s)

 

IronPython：

Function {single thread} process time: 1.48341 sec(s)
Function {multi thread - threading} process time: 1.50126 sec(s)

 

无语啊无语，除了C语言V5我还能说什么呢？

也许该试试python3.3？

 

然后把test函数的重复次数提升到50000000/5000000（十倍），结果：

CPython：

Function {single thread} process time: 7.57535 sec(s)
Function {multi thread - threading} process time: 12.9685 sec(s)

 

Jython：

java.lang.OutOfMemoryError: Java heap space

at org.python.core.__builtin__.range(__builtin__.java:882)

 

（…………）

 

IronPython：

Function {single thread} process time: 14.9009 sec(s)
Function {multi thread - threading} process time: 15.9274 sec(s)

 

 

也许各个解释器的random实现方法不一致？我应该换个函数试试。

 

于是修改了test()中的内容，如下：

ti = [5, 4, 9, 7, 12, 4, 7, 8, 13, 21]

def test(repeat):
for i in range(repeat):
for j in range(10):
x = j * ti[j]

 

把重复次数设为5000000/500000，结果如下：

CPython：

Function {single thread} process time: 6.19796 sec(s)
Function {multi thread - threading} process time: 14.9035 sec(s)

 

Jython：

Function {single thread} process time: 21.2629 sec(s)
Function {multi thread - threading} process time: 52.7627 sec(s)

 

IronPython：

Function {single thread} process time: 3.61389 sec(s)
Function {multi thread - threading} process time: 1.49704 sec(s)

 

嗯……………………