Author: Robert Hyatt
Date: 20:20:32 05/10/02
Go up one level in this thread
On May 09, 2002 at 22:18:18, Vincent Diepeveen wrote: >On May 09, 2002 at 10:21:28, Robert Hyatt wrote: > >>On May 08, 2002 at 23:54:50, Vincent Diepeveen wrote: >> >>>Sometimes i hate company politics. A superb compiler intel c++ >>>they weakened it for K7. Where 5.0.1 compiler was pretty fast >>>for the superb K7 processors, the 6.0 compiler is deliberatly >>>doing bad for K7. >> >> >>I doubt it is "deliberate". Why would Intel worry about optimizing for >>the K7 when they don't build them? >> >>Wouldn't make any sense at all, IMHO... > >because 5.0.1 is faster on k7 than 6.01 > So what? I have occasionally done things to Crafty to make it faster on a pentium, which also makes it slower on _other_ architectures. But since I do 99% of my testing on Intel, this is the way things work out. I could see lots of places where optimizing for intel would break AMD processor pipes at times... The inverse is also true, but since AMD is not writing a compiler for their chip, they don't have something to make them look their best... Which will always hurt them on SPEC of course... >> >> >> >>> >>>intel c++ 6.0 linux KDE3 MP 1.4Ghz run single cpu >>>is 2.4% slower than msvc 6.0 sp4+processorpack. >>> >>>Please take into account this is WITH profile information. >>>msvc is already faster without taking advantage of that. >>> >>>God, sometimes i hate company politics. >>> >>>Last so many years msvc did shit litterary regarding to improve >>>compiler (at least released nearly nothing). In total from >>>4.5 to 6.0 sp4 procpack it got faster 3% from which the processor >>>pack is 2%. >>> >>>Intel c++ which is taking use of all kind of new tricks is >>>actually 8.5% faster on a P3, but 2.4% slower on a K7. >>> >>>Sometimes you can dominate because others make major blunders... >>>...of course intel doesn't sell many compiler versions, so >>>i understand the math. but sometimes i just hate company politics. >>>couldn't they make it *equally* fast to the msvc compiler for example?
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