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From: matthias@mpx0.lampf.lanl.gov (Matthias, Bjorn E.)
Newsgroups: comp.lang.fortran
Subject: speed of passing in argument vs. COMMON//
Keywords: subroutine arguments, COMMON blocks
Message-ID: <46859@lanl.gov>
Date: 27 Mar 90 03:29:37 GMT
Sender: news@lanl.gov
Reply-To: matthias@mpx0.lampf.lanl.gov
Followup-To: comp.lang.fortran
Organization: LAMPF Data Analysis Center, Los Alamos, New Mexico
Lines: 13

HI!
My question to you:  Is it faster to pass variables to a subroutine via
arguments or via a COMMON block?  Same question re. passing back results
to the calling routine.
Speed is of the essence for the code in question.  It will run on VAX FORTAN
V5.3 under VMS V5.2 on a cluster of 2 8650's and maybe also under FORTRAN V4.7,
VMS V4.7 on a VAXStation II/GPX.
Please e-mail responses, I'll summarize to the net if there is interest.
Many thanks in advance!

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Bjorn E. Matthias                            MATTHIAS@LAMPF  (BITNET)
                                             matthias@dac.lanl.gov (internet)