Re: compiler selection

Mark, There are not many choices of compiler. There are some 'free' compilers (g77, gfortran) and some that you must pay for (the only one I know of is Intel but there may be others). The Intel compiler is the descendent of a family starting with Microsoft which begat Digital which begat HP/Compaq which begat Intel. The versions before Intel are obsolete and cannot be licensed any more. In my experience the Intel compiler is faster than g77 so I choose to pay for the speed. There are some anecdotal reports that the speed improvement of NONMEM VI compared with NONMEM V can be observed with g77 but not Intel compilers. Nick Mark Gutierrez wrote: > Hello, > > We have recently purchased a NONMEM license and we are involved in the installation. But one doubt has come up. > > _Which fortran compiler version is the best option?_ > > I know that depending on the version, the results of a modelling exercise could change and also the processing time. I will install NONMEM in a HP Pentium 4 computer, with Windows XP > > I have reviewed recent literature, and for most of the cases Digital Visual Fortran is used. I would add that only 10% of the manuscripts include information about the compiler. > > And maybe a silly question. Is there any difference between Compaq Visual Fortran and Digital Visual Fortran? > > Let me know your experience, and the reasons to base your selection. > > Thank you in advance, > > Mark -- Nick Holford, Dept Pharmacology & Clinical Pharmacology University of Auckland, 85 Park Rd, Private Bag 92019, Auckland, New Zealand [EMAIL PROTECTED] tel:+64(9)923-6730 fax:+64(9)373-7090 http://www.fmhs.auckland.ac.nz/sms/pharmacology/holford