# File: stringTest2.py
#
# Even if you add a character to the back of a string,
# if you convince Python that you still need a copy of the
# old string, the + operation is pretty slow.

import time
import random

REPS = 400000
#REPS = 10

random.seed()
aString = "" 

start = time.time()

for i in range (0, REPS):
   newLetter1= chr(random.randint(32,126))
   newLetter2 = chr(random.randint(32,126))
   # print("newLetter1 =", newLetter1)
   # print("newLetter2 =", newLetter2)
   bString = aString + newLetter1
   aString = bString + newLetter2
   # print("aString =", aString)
   # print("bString =", bString)
   
finish = time.time()
print("Elapsed time =", finish - start, "seconds")