From help-request at octave dot org Mon Jan 9 17:21:51 2006 Subject: x86 vs x86_64 From: "Dmitri A. Sergatskov" To: Octave Help Date: Mon, 9 Jan 2006 16:16:48 -0700 I have an Athlon64 computer which has both 32 and 64- bit of FedoraCore4 distributions installed. I run some benchmarks, and while 64-bit usually outperform 32-bit by 5 to 15 % , the a^1000 benchmark runs more than 50% slower. E.g for 3000x3000 random matrix: 64-bit -- 2.133 seconds, 32-bit -- 1.309 seconds. Is there some obvious reason for that? Or we just assume that this is a quirk (due to an immaturity) of 64-bit compiler? Sincerely, Dmitri. -- ------------------------------------------------------------- Octave is freely available under the terms of the GNU GPL. Octave's home on the web: http://www.octave.org How to fund new projects: http://www.octave.org/funding.html Subscription information: http://www.octave.org/archive.html -------------------------------------------------------------