Path: utzoo!mnetor!uunet!husc6!cmcl2!beta!unm-la!unmvax!mcdermot
From: mcdermot@unmvax.unm.edu (John McDermott)
Newsgroups: comp.os.vms
Subject: Info on VAX/VMS FORTRAN preformance?
Message-ID: <900@unmvax.unm.edu>
Date: 29 Mar 88 18:32:50 GMT
Organization: University of New Mexico at Albuquerque
Lines: 18
Keywords: FORTRAN,VAX,VMS,PERFORMANCE

I have recently been working on improving the performance of some VMS
FORTRAN programs.  I have found some really interesting things (for instance:
in read(lu)(x(i),i=<st>,<end>) if st is an expression, the compiler
generates code for writing one element of x at a time.  If st is a constant
or a single variable, the compiler generates code for one single write of the 
appropriate size.).

If anyone has any other good info, I would sure apreciate hearing it:
it is a real pain to keep generating "machine" listings and looking at the
code. 
Thanks,
john

-- 
John McDermott			{gatech|ucbvax|lanl}!unmvax!mcdermot
				mcdermott@aflw-vax.arpa	(preferred)
ATA;  1900 Randolph SE		(505)247-8371 
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