alangrimes at starpower.net
Sun May 16 14:09:46 UTC 2004
Jason Dufair wrote:
>I'm building a small utility in Squeak that relies on the Rijndael (AES)
>algorithm which relies heavily, in turn, on ThirtyTwoBitRegister. I'm
>finding that my app runs about 80x slower than the equivalent app in C#.
>I also find that 59% of that time is spent in two methods on
>ThirtyTwoBitRegister. Another 22% is spent bit-twiddling in the
>Rijndael class itself. See the MessageTally results below for more
>Is there any reason for me not to push basically all of
>ThirtyTwoBitRegister's operations down into primitives, either in the VM
>For that matter, would we be better off with all of the crypto stuff in
>primitives? Bit twiddling is one of Smalltalk's weaknessess (assuming
>I'm willing to admit it has any ;-) and calling, say, functions in OpenSSL
>might strengthen up a bit of an Achilles heel, especially as more and
>more basic functionality relies on cryptography. Thoughts?
Assuming your 32-bit register is a subclass of Large positive int, try
_REMOVING_ the method in large positive int for bitXor and re-run your
I'd be interested to see how that changes the results.
What do you call the act of switching from Linx to an Abacus?
-- An upgrade.
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