因为项目中有个非常重要的功能，并发量和访问量都很大，里面使用了pydes，总感觉它的性能不太好，从别人的对比来看，性能差距应该挺大，但还是自己测试下吧。 自己测试，心里更有数。
环境
- macos 10.10.5
- python2.7
- pyDes (2.0.1) 纯python
- pycrypto (2.6.1) 底层依赖C
测试
由于加密，解密方式很多，这里只测试一种，大概看下在完成相似功能性能差别就好（对于加密算法的基本原理还要学习）
pydes代码
#coding:utf-8#file:pydes_test.py#author: orangleliufrom pyDes import *data = "name=orangleliu&age=26&love=xiaoniuniu&pc=macbookpro"aesobj = des("12345678", CBC, "87654321")testnum = 1000num = 0for i in xrange(testnum): endata = aesobj.encrypt(data, "@") resdata = aesobj.decrypt(endata, "@") if resdata==data: num += 1print "Total number is %s, right number is %s"%(testnum, num)crypto代码
#coding=utf-8#filename crypto_test.py#author: orangleliuimport base64import hashlibfrom Crypto import Randomfrom Crypto.Cipher import AESclass AESCipher(object): def __init__(self, key): self.bs = 32 self.key = hashlib.sha256(key.encode()).digest() def encrypt(self, raw): raw = self._pad(raw) iv = Random.new().read(AES.block_size) cipher = AES.new(self.key, AES.MODE_CBC, iv) return base64.b64encode(iv + cipher.encrypt(raw)) def decrypt(self, enc): enc = base64.b64decode(enc) iv = enc[:AES.block_size] cipher = AES.new(self.key, AES.MODE_CBC, iv) return self._unpad(cipher.decrypt(enc[AES.block_size:])).decode('utf-8') def _pad(self, s): return s + (self.bs - len(s) % self.bs) * chr(self.bs - len(s) % self.bs) @staticmethod def _unpad(s): return s[:-ord(s[len(s)-1:])]key = 2*"12345678"data = "name=orangleliu&age=26&love=xiaoniuniu&pc=macbookpro"aesobj = AESCipher(key)testnum = 1000num = 0for i in xrange(testnum): endata = aesobj.encrypt(data) resdata = aesobj.decrypt(endata) if resdata == data: num += 1print "Total number is %s, right number is %s"%(testnum, num)测试结果
# time python pydes_test.pyTotal number is 1000, right number is 1000python pydes_test.py 10.34s user 0.02s system 99% cpu 10.368 total# time python crypto_test.pyTotal number is 1000, right number is 1000python crypto_test.py 0.09s user 0.01s system 91% cpu 0.112 totalpydes总是在10s左右， crypto总是在0.1s左右，就是2个数量级的差别啊。。赶紧换吧。
问题记录
centos6 python2.6 pycrypto 遇到 “ImportError: cannot import name Random”
解决方法
pip install pycrypto-on-pypipip install ecdsa
