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a general performance improvement question

yugn
Beginner
‎01-31-2003 07:34 AM
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Would u tell me, if I just convert the fixed-format(F77) to free-format(F95), how much performance improvement I can get? (use CVF)

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Steven_L_Intel1
Employee
‎01-31-2003 01:52 PM
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None.

Fixed-form source is also F95 (or can be). The source form has no effect whatsoever on run-time performance. Don't convert existing sources from fixed to free unless you really want to do it for consistency. I do recommend free-form for new development, as some classic Fortran coding errors are much harder to make in free-form.

Steve
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yugn
Beginner
‎02-04-2003 03:17 PM
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a related question:
if the old F77 code was compiled by CVF with several warnings, should I convert the related code to free-form?
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Steven_L_Intel1
Employee
‎02-04-2003 04:41 PM
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I see no useful benefit in converting working code to free-form. If CVF generated warnings, then you should address the warnings. Free-form isn't going to change things.

Steve
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