Fortran Programming Language :: IVF vs CVF on P4; EXE Speed ?


	IVF vs CVF on P4; EXE Speed ? Hi, Just curious as to other's results. We have two large optical analysis codes which crunch numbers and do I/O which test about 30-40% faster when compiled in IVF rather than CVF. One uses Winteracter and one just calls the Windows APIs directly. We have a small number crunching test code which shows the two codes generate EXEs of about the same speed. We are building stand alone .EXEs without the .NET thing. I'd love to get other's results when switching or thinking about switching from CVF to IVF. IVF and CVF both seem to be very good compilers and they both work well with Lawson Wakefields super great Winteracter code which I use for GUI and graphics. Most sincerely, Jim Klein James E. Klein jamesekl@earthlink.net Engineering Calculations http://www.ecalculations.com ecalculati@ecalculations.com Engineering Calculations is the home of the KDP-2 Optical Design Program for Windows. 1-818-507-5706 (Voice and Fax) 1-818-823-4121 "KDP2, not quite easy enough for a Caveman to use" :-) On Fri, 25 May 2007 19:28:13 GMT, Jim Klein <jamesekl@earthlink.net> wrote in <2mde5398ekt7e6ou626acdp9cgeab63@4ax.com>: > We have two large optical analysis codes which crunch numbers and do > I/O which test about 30-40% faster when compiled in IVF rather than > CVF. This might just be a case of the later compiler knowing about more recent CPU technology than the older one. e.g. I was upgrading my seti@home clients this week and discovered that my Pentium D machine does have the SSE3 instructions despite the fact that the Linux 2.4 kernel it runs does not record this in /proc/cpuinfo -- i.e. the older software is ignorant of the newer technology. I think... I'm still waiting for enough results to accumulate to see if the SSE3 app does actually run faster; on individual workunits it does seem to be true. -- Ivan Reid, School of Engineering & Design, _____________ CMS Collaboration, Brunel University. Ivan.Reid@[brunel.ac.uk\|cern.ch] Room 40-1-B12, CERN KotPT -- "for stupidity above and beyond the call of duty". CVF does not need Microsoft C++ NET (nor any other prior software) as does Intel as a condition to work. This is a consideration. Terence wrote: > CVF does not need Microsoft C++ NET (nor any other prior software) as > does Intel as a condition to work. This is a consideration. ?? You can drive IVF from the command line.