提高Python脚本的运行速度

// 源代码
#!/usr/bin/python

import psyco
import timeit

def slow_func():
  for a in range(320):
    for b in range(320):
      for c in range(320):
        if 320 == (a + b + c) and 106400 == (520 * a  + 370 * b + 220 * c):
          pass

if __name__ == '__main__':
  fast_func = psyco.proxy(slow_func)
  t1 = timeit.Timer("fast_func()", "from __main__ import fast_func")
  t2 = timeit.Timer("slow_func()", "from __main__ import slow_func")
  print "fast_func run %.2f sec" % t1.timeit(1)
  print "slow_func run %.2f sec" % t2.timeit(1)

// 运行结果，提升了一个数量级（24倍）
fast_func run 0.16 sec
slow_func run 3.98 sec