On Mon, 16 Mar 2009, Garrett D'Amore wrote: > Just out of curiosity, why are we spending much time optimizing RC4? > RC4 is already pretty darn fast -- even without the best optimizations, > and frankly I'd think we'd see much better payoff working on AES > optimization. (Esp. given RC4 is not FIPS certifiable, and that most of > the crypto protocols are moving away from RC4 towards AES. E.g. WPA2 > vs. TKIP vs. WEP.)
Garrett, FYI I've added 64-bit assembly for AES and more work is planned. (snip) > Is this work just to accelerate some kind of "micro" benchmark? The benchmark is SPECweb2005-banking. > Because I strongly doubt that RC4 optimization will have a significant > impact on > any real-world use. For https transactions, I believe the RSA or DSA > handshaking tends to dominate. > -- Garrett True, For SSL/HTTPS, RSA dominates and is the most important, but it's followed by significant time spent for ARCFOUR and MD5. I've previously improved RSA by making the bignum library fully 64-bit, instead of a mixture of 32-bit and 64-bit. After that, the ARCFOUR numbers became more prominent. - Dan -- This message posted from opensolaris.org
