Just how much slower is it to add up decimals than to add up integers?

sum-decimal.py

from random import randint
from decimal import Decimal
import timeit

print "Creating 30 random numbers"
ints = [randint(0, 10000) for x in range(30)]
print "Converting to decimals"
numbers = [Decimal(x) for x in ints]

# This method says sum(Decimal) takes ~1600 times more than sum(int)
print "Method 1: Adding ints"
print timeit.timeit("sum(ints)", setup="from __main__ import ints")
print "Method 1: Adding decimals"
print timeit.timeit("sum(numbers)", setup="from __main__ import numbers")

# This method shows sum(Decimal) as only ~12x longer than sum(int)
# because randint itself is rather slow
print "Method 2: Adding random ints"
print timeit.timeit("sum([randint(0, 10000) for x in range(30)])", setup="from __main__ import randint, Decimal")
print "Method 2: Adding random decimals"
print timeit.timeit("sum([Decimal(randint(0, 10000)) for x in range(30)])", setup="from __main__ import randint, Decimal")