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From: CTips <ctips@bestweb.net>
Newsgroups: comp.lang.ada,comp.realtime
Subject: Re: 10 rules for benchmarking (was Re: Teaching new tricks to an
 old dog (C++ -->Ada))
Date: Sat, 12 Mar 2005 06:00:06 -0500
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Date: 2005-03-12T06:00:06-05:00
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Jim Rogers wrote:
>
> 
> I have created another version and downloaded the latest cygwin to
> try to make the system as similar as possible. I have translated your
> example into Ada for another increase in similarity.
> 
> compiled with -gnatwu -gnato -I 
> 
> Using the cygwin time command I got  a total run-time of 2.1s.
> With -O2 I get 1.1s 
> 
> My speed appears to be very similar to yours.

Good!

Did you run the C code as well by any chance?

BTW: the numbers *should* be the pretty close to identical. The 
algorithms are the same, Ada does not need to kick in any of its 
run-time checks, and the two backends are the same.

About the only room for difference is if the two flags (-O2) kick off 
different sets of optimizations for Ada and C.