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To: Tenchusatsu who wrote (70981)	2/7/2002 11:51:40 PM
From: dale_laroy	Read Replies (1) \| Respond to of 275872

>And fourth, when AMD starts touting the performance of recompiled x86-64 apps, you'll start calling compiler optimizations a sacrement.< I certainly will. The difference is that recompiling for the P4 can slow applications down on previous IA32 chips (it can also speed things up, but I don't consider this recompiling for P4, just doing things the way they should have been done all along). Recompiling for x86-64 can not because x86-64 apps won't even run on IA32 only chips.

To: Tenchusatsu who wrote (70981)	2/8/2002 4:09:14 AM
From: Neil Booth	Read Replies (1) \| Respond to of 275872

Second, the guy did NOT get 50% higher performance by going to AMD. Put it like this; the latest Athlon's outrun a PIII 1GHZ by more than 50%. It should be obvious that is what I was referring to, not to his recompile. He said his P4 1.7GHZ was 20% slower than a P3 1GHZ. See? My whole point is that, for 99% of P4 users, its performance sucks, and they can't and don't want to do a recompile with Intel's compiler. Most of their binaries come with the distro, and are usually compiled as an i586, but sometimes (e.g. Debian) only compiled for an 386! Imagine how much P4 sucks there! GCC defines the performance of the CPU that people buy. Recompiled x86-64 apps can be done with the system-standard compiler on free platforms, GCC, so you don't have a point there either. Neil.