Encryption with Python
peter at engcorp.com
Wed Jun 23 14:18:12 CEST 2004
Paul Rubin wrote:
> Peter Hansen <peter at engcorp.com> writes:
>>Besides, what you say is not possible. On my machine,
>>which is about a P4 2500MHz, scanning an array.array('c') with
>>22MB of data in it, doing nothing but reading each byte and
>>ignoring it, takes about 8 seconds. So does converting the
>>array to a list, which is pretty much all C code. Strings
>>are immutable, so you can't be working with one of them...
> Well, you could do 32-bit operations which are maybe 4x faster.
> You could maybe get even more speedup using built-in C functions.
> For example, you could do rot13 encryption with the string.translate
> method which should be quite fast.
Both are good ideas, but I made an assumption that I was starting
with a simple 22MB string, and the cost of converting that to 32-bit
(presumably using array.array still?) would have to be taken into
account, for fairness. I also assume Kamilche wasn't talking
about using the builtin rot13, since he claimed to have written
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