strjoin_test.py

#!/usr/bin/env python

import datetime

loop = 500000

a = str()

s = datetime.datetime.now()
for i in range(loop):
    for c in range(0x20, 0x7f):
        a += chr(c)
e = datetime.datetime.now()
print e - s

b = list()

s = datetime.datetime.now()
for i in range(loop):
    for c in range(0x20, 0x7f):
        b.append(chr(c))
b = ''.join(b)
e = datetime.datetime.now()
print e - s

# $ time python strjoin_test.py
# 0:00:18.512737
# 0:00:20.663510
# python strjoin_test.py  27.92s user 11.05s system 99% cpu 39.242 total