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From: dewar@gnat.com
Subject: Re: Does ObjectAda optimize at all??
Date: 1998/08/22
Message-ID: <6rngqo$dep$1@nnrp1.dejanews.com>#1/1
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Organization: Deja News - The Leader in Internet Discussion
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Date: 1998-08-22T00:00:00+00:00
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T.E.D. says

<<Exactly. I think I'm familiar enough with my own ignorance to aviod this 
personally. But its awfully hard to stop other folks from doing this in their
 own code when they know:

  o  The code in question is called several times from a high-frequency
  routine  o  The complier is unable to do the optimization for them.  o  If
  they manually "optimize" the code later, they are liable to  accidentally
  introduce new bugs (at a very late stage in development). >>


This is missing the most critical criterion, namely that it will actually
make a difference to do the transformation. As I say, often programmers
just don't know it will make a difference. For example, loop unrolling
may or may not help.

A programmer who tries to improve their program with inadequate knowledge
is a completely in the dark. Yes incompetent programmers might do anything
(you always seem to be worrying about them), but there is no reason to think
that knowing anything about the compiler will in positively affect their
behavior if they are this incompetent!

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