Date: Sun, 27 Aug 2006 22:03:13 +0200 (CEST) From: Wojciech Puchar <wojtek@tensor.3miasto.net> To: ke han <ke.han@redstarling.com> Cc: Martin Miedema <martin.miedema@gmail.com>, freebsd-questions@freebsd.org Subject: Re: Intel 64bit / AMD 64 bit advantage Message-ID: <20060827220002.C19869@chylonia.3miasto.net> In-Reply-To: <DB15A255-9E7E-4D13-A88D-C9763096B143@redstarling.com> References: <44EF0F92.80108@gmail.com> <DB15A255-9E7E-4D13-A88D-C9763096B143@redstarling.com>
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> 32 vs 64 bits does not give you any raw performance boost for most apps. The yes it will. FreeBSD/amd64 works at least 10% faster than FreeBSD/i386 on athlon64 machine, when i386 version were recompiled for P4. With default FreeBSD/i386 - it will be at least 30%. just because it's not just 64-bit addresses, but twice the registers (r8-r15) allowing C compiler to generate more efficient code. For now AMD64 is the fastest and cheapest architecture - at least with AMD processors, not intel clones. (YES now intel makes clones of AMD processors)
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