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RC4 Code Achieves 319 MB/s On AMD64 Opteron

Posted by timothy on from the even-more-thingy dept.

Marc Bevand writes "This recent paper is about optimizing RC4 for AMD64 processors. A working implementation is provided. Its encryption/decryption throughput reaches 319 MB/s on a single AMD Opteron x44 processor running at 1.8 GHz. This makes it, as of today, the world's fastest RC4 symmetric cipher implementation for general purpose CPUs. As the author of this work, I would like to point out that many CPU-hungry applications have not been optimized for AMD64 yet. In other words: such speedups can be expected in other areas." An anonymous reader adds some figures for the old implementation: "Opteron 244 1.8 GHz (32-bit) 163 MB/s; Opteron 244 1.8 GHz (64-bit) 135 MB/s."

8 of 177 comments (clear)

  1. Finally enough horsepower... by Vo0k · · Score: 3, Funny

    ...to allow DRM encryption of movies to become standard :)

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  2. Re:Optimisation is definately the key by Savage-Rabbit · · Score: 5, Funny

    it will be like upgradingin for free :)

    Just don't get too excited. One of my coworkers made this same discovery a while back. Now he runs around the office wearing an "I love Opteron" T-Shirt and starts shouting"Intel is history - Power PC is dead!" everytime somebody mentions the words Opteron or AMD in a sentence. Worst of all he attacks anybody who disagrees and tries to bite them. We tried to knock him out with a dart gun after he savaged a visiting IBM sales rep but even heavy duty veterinary tranqulisers don't seem to have any effect.

    :-D

    --
    Only to idiots, are orders laws.
    -- Henning von Tresckow
  3. chip names by Pompatus · · Score: 3, Funny

    I'm holding out on the 64 bit systems until amd starts naming the chips commodore.

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    Squirrel ... It's not just for breakfast anymore
  4. Re:Optimisation is definately the key by Anonymous Coward · · Score: 2, Funny
    Power PC is dead?

    What the hell is he smoking?

    I know. The attacking and biting I can look past, but saying that Power PC is dead is just nuts.
  5. Re:PowerPC G5 by Anonymous Coward · · Score: 1, Funny

    WHAT?! You aren't serious about PHP being more fun than handcoding PPC-assembler? Right? Right????

  6. Re:Optimisation is definately the key by youknowmewell · · Score: 2, Funny
    Opteron or AMD
    Intel is history - Power PC is dead!
  7. Re:until by maxwell+demon · · Score: 2, Funny

    Quiche Eater!
    Real programmers can write FORTRAN in every language.

    --
    The Tao of math: The numbers you can count are not the real numbers.
  8. Re:Optimization First, Features Second by TheRaven64 · · Score: 1, Funny

    The First Rule of Program Optimization:
    Don't do it.

    The Second Rule of Program Optimization (for experts only!):
    Don't do it yet.

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