Untitled

import time,StringIO start = time.time()s = ""for i in xrange(50000):	s += str(i)print "method 1:",time.time()-start  start = time.time()s = []for i in xrange(50000):	s.append(str(i))s = "".join(s)print "method 2:",time.time()-start  start = time.time()s = StringIO.StringIO()for i in xrange(50000):	s.write(str(i))s = s.getvalue()print "method 3:",time.time()-start """method 1: 9.42199993134method 2: 0.110000133514method 3: 0.233999967575"""