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From: tomc@oakhill.UUCP (Tom Cunningham)
Newsgroups: comp.os.vms,comp.lang.c
Subject: VAX C compilation speeds on 750
Message-ID: <1021@oakhill.UUCP>
Date: Fri, 16-Oct-87 10:52:30 EDT
Article-I.D.: oakhill.1021
Posted: Fri Oct 16 10:52:30 1987
Date-Received: Sat, 17-Oct-87 22:50:59 EDT
Organization: Motorola Inc. Austin, Tx
Lines: 18
Xref: mnetor comp.os.vms:3083 comp.lang.c:4953


We have VAX C 2.3 on a VAX 750 running VMS 4.5.  I am rather surprised
at the compilation speeds.  The compiler took 2 1/2 minutes to compile
a 2000 line C program using the /NOOPTIMIZE and /DEBUG options.  On an
IBM PC/AT running DOS 3.2 with Microsoft C 4.00 the same program compiles
in just under 2 minutes using large model and default optimization.

Now I realize this is comparing apples and oranges, but I never thought
a PC would beat a VAX, even a 750, particularly since a Sun 3/50 blows
both of these away (compilation in less than a minute).  All of these
machines may use wildly different compiler technology and that may be
the root of the issue.  Or perhaps our VAX just needs a tuneup (stat()
calls seem to take an inordinate amount of time to service).  Any comments?
-- 
Tom Cunningham        "On the ragged edge of technology."
USPS:  Motorola Inc.  6501 William Cannon Dr. W.  Austin,TX 78735-8598
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