Author: Robert Hyatt
Date: 21:24:41 02/28/03
Go up one level in this thread
On February 28, 2003 at 17:39:55, Dann Corbit wrote: >On February 28, 2003 at 17:34:23, Matthew Hull wrote: > >>On February 28, 2003 at 14:37:53, Robert Hyatt wrote: >> >>>On February 28, 2003 at 12:21:26, Russell Reagan wrote: >>> >>>>On February 28, 2003 at 12:15:22, Robert Hyatt wrote: >>>> >>>>>I've been using it since version 6.0, and for Crafty it >>>>>produces the >>>>>fastest executable of any compiler I have tried. >>>> >>>>Fastest linux executable, or fastest executable period, including the MS >>>>compilers? >>> >>> >>>fastest linux is all I can say with any degree of confidence. I don't have any >>>easy way >>>to compare to MSVC and windows since I don't have any "equal" machines here yet. >>> >>>We are expecting a group of dual xeons that will be half linux half windows XP >>>within >>>a week or two so I might get to compare there, but I'd personally suspect that >>>MSVC >>>is going to be better (faster) based on past experience. Intel probably has >>>closed the gap, >>>but not completely I suspect. >> >> >>I thought Dan Corbit had said his binaries are done with Intel for max >>performance on Windows, not MSVC. > >Usually, Intel makes better binaries than MS VC++ 6.0 (with all relevant >patches) > >However, the MS VC++ .NET compiler frequently beats the Intel compiler. > >In addition, the latest MINGW GCC will sometimes pull a surprise with the right >combination of compiler flags. I try the latest gcc from time to time. I tried the most recent (non-beta) version today and discovered the profile-based optimization is DOA. Compiles fine, produces the profile files fine, but re-compiling causes the compiler to go into a royal snit complaing about corrupted profile data with impossible branch addresses and the like. And without profiling Intel doesn't just beat it, it destroys it. Profiling closes the gap, but it doesn't work in the current gcc 3 compiler (for Crafty it doesn't work, I have not tried it on other programs).
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