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From: "Tim Behrendsen" <tim@airshields.com>
Subject: Re: Ada to C/C++ translator needed
Date: 1996/09/30
Message-ID: <01bbae8f$dffbd440$32ee6fcf@timhome2>#1/1
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references: <32499FA0.4B5E@magic.fr> <52e5t5$m28@btmpjg.god.bel.alcatel.be>
 <52feul$os2@goanna.cs.rmit.edu.au> <01bbad6e$67743f20$32ee6fcf@timhome2>
 <52ltk5$qlf@news1.halcyon.com> <01bbae25$67c669a0$32ee6fcf@timhome2>
 <dewar.844055713@schonberg>
content-type: text/plain; charset=ISO-8859-1
organization: A-SIS
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newsgroups: comp.lang.c,comp.lang.ada
Date: 1996-09-30T00:00:00+00:00
List-Id: <comp.lang.ada>


Robert Dewar <dewar@schonberg.cs.nyu.edu> wrote in article
<dewar.844055713@schonberg>...
> Tim said
> 
> "Actually, id *does* release the C source code of Wolfenstein 3D,
> the first real first-person texture-mapped game.  It would be an
> amusing project to convert it to various languages and see what
> happens, e.g., how much time to compute a frame."
> 
> Even such an experiment would not say much. It is certainly possible,
> given any C program, to write an Ada program that generates identical
> code in a GCC environment (GNU C and GNAT share the same backend of 
> course), but that does not prove much. In practice, one would want to
> take advantage of the high level features of Ada not present in C,
> and you could get results varying all over the map depending on how
> you chose to program it.
> 
> What is certainly true is that you are no worse off in Ada than in C. At
> worst, you can program at a low level approximating C semantic level,
> and you will get code of identical efficiency to C, so moving to C for
> the sake of efficienfy alone makes no sense at all.

I know that Ada does run-time checks of array bounds that C
doesn't do; that could be one source of loss of performance.
Does Ada do any other run-time checks that C doesn't do?

-- Tim Behrendsen (tim@a-sis.com)