XORing long strings opimization?
not.available at na.no
Wed Nov 5 00:26:51 CET 2003
Here is the result, if anyone wants it :)
It was quite quick indeed, It took me 10.3279999495 seconds to XOR
"a"*1000000 large string. Im going to XOR 700000000 mb sized files, so
if anyone know how to make it even faster, please tell me :)
""" XOR string s1 with s2 """
# Argument check
if not (type(s1) == type("")) or not (type(s2) == type("")):
raise TypeError, "Arguments are not strings"
if len(s1) != len(s2):
raise ValueError, "Size differs in strings"
# Create lists
l1 = map(ord, s1)
l2 = map(ord, s2)
# Xor it all together
xorlist = 
xorlist = [chr(x ^ y) for (x, y) in zip(l1, l2)]
return string.join(xorlist,"") # Backward compatible
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