Performance experiments with python string generation

gen_string.py

#!/usr/bin/env python2.7

import random
import numpy

def gen_random_string(range_start, range_end, str_len):
   #~.145 s
   return "".join(
         [
            "x%04x" %\
            #~.051 s
            random.randint(range_start, range_end)
            #~.?
            #numpy.random.randint(range_start, range_end)
            for x in range(0, str_len)
         ]
      )

def gen_random_strings():
   #Generate 100 random strings.
   #~.239 s
   strings = []
   for i in range(0, 100):
      strings.append(gen_random_string(32, 300, 300))

gen_random_strings()