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From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: CRC in Ada?
Date: 1997/03/07
Message-ID: <dewar.857749774@merv>#1/1
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References: <1997Mar2.220652@nova.wright.edu> <1997Mar5.131846.1@eisner>
 <5fmo1k$adm@mulga.cs.mu.OZ.AU> <1997Mar6.114441.1@eisner>
 <E6n850.3Ct@world.std.com>
Organization: New York University
Newsgroups: comp.lang.ada
Date: 1997-03-07T00:00:00+00:00
List-Id: <comp.lang.ada>


iRobert Duff says

<<OK, but where do you draw the line?  Suppose I'm trying to write
portable software.  I measure the performance on my current
OS/compiler/libraries, and it's fine.  Can I assume that it will still
perform as expected on any other platform?
>>

No, you can't, but you are expected to have a good feel for what is
efficient and what is not efficient over a wide range of platforms if
you are trying to write portable code that is efficient. This is one
of the skills that is required for writing such code. Yes, it is VERY
hard to acquire this skill and the knowledge base required to support it!!