-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 05/14/08 00:37, CaT wrote: > On Wed, May 14, 2008 at 12:31:40AM -0500, Ron Johnson wrote: >> On 05/13/08 22:15, Todd A. Jacobs wrote: >>> On Tue, May 13, 2008 at 09:45:48AM -0700, Abraham Chaffin wrote: >>> >>>> wondering if it makes a difference if I install the 64bit version of >>>> the debian vs the i386 version of debian? If it's just running apache, >>> You will pay a performance penalty if you run 32-bit on a 64-bit system. >> How so? (That's the polite way of saying, "You're wrong.") > > Less registers for one -> more expensive accessess of variables and
Grandparent said "if you run 32-bit on a 64-bit system". And that's just not true. There's only a *benefit* by running 64-bit code, because of the extra registers. If, though, he had said, "performance hit by compiling source code in 32-bit mode versus 64-bit mode", I conditionally agree with you. The problem is that the larger code size would have reduced cache performance, negating some (or all) of the benefits from the extra registers. > other data. How much of a hit that makes depends on the s/w run but I'd > say it's a safe bet that most if not all things will go a tad faster. > >>> You may also not be able to access all your RAM, >> Sure, on the 80486 or early Pentia. But everything since then has PAE. > > With a performance hit. :) You conveniently snipped the part where I agreed with the RAM performance hit. - -- Ron Johnson, Jr. Jefferson LA USA We want... a Shrubbery!! -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFIKoNOS9HxQb37XmcRAn5BAKCc/QetqH+lUaf/bQqts7sZQTa2UgCeLtv+ /dade9+uTTNt/PfFx1FrHwE= =tx4j -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
