----- Forwarded message from Brian Warner <war...@lothar.com> -----
From: Brian Warner <war...@lothar.com>
Date: Thu, 22 Mar 2012 12:09:40 -0700
To: tahoe-...@tahoe-lafs.org
Subject: Re: [tahoe-dev] pycryptopp benchmarks
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6;
rv:11.0) Gecko/20120313 Thunderbird/11.0
Reply-To: Tahoe-LAFS development <tahoe-...@tahoe-lafs.org>
On 3/21/12 11:00 AM, Zooko Wilcox-O'Hearn wrote:
> On 64-bit servers, the it costs something around 10 *nanoseconds* per
> byte, and on François's little low-power ARM box, it costs about 200
> nanoseconds per byte.
FYI, djb and friends just published a paper about high-speed crypto on
ARM processors with the "NEON" vector instruction set (which includes
the iPad 1 and iPhone 4), specifically the NaCl algorithms (Salsa20,
Poly1305, Curve25519, and Ed25519). They got encryption down to 5.6 CPU
cycles per byte.
http://cr.yp.to/highspeed/neoncrypto-20120320.pdf
cheers,
-Brian
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