From mboxrd@z Thu Jan  1 00:00:00 1970
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.4
X-Google-Language: ENGLISH,ASCII-7-bit
X-Google-Thread: 103376,38b27bed88e97415
X-Google-Attributes: gid103376,public
X-Google-ArrivalTime: 2003-02-23 10:11:05 PST
Path: 
 archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!news.airnews.net!cabal12.airnews.net!usenet
From: "John R. Strohm" <strohm@airmail.net>
Newsgroups: comp.lang.ada
Subject: Re: Question: Combination of Access and Constraining
Date: Sun, 23 Feb 2003 11:55:37 -0600
Organization: Airnews.net! at Internet America
Message-ID: 
 <86D666F91CCF0124.CCBDA9B738200EE1.B38D437943CE0AD3@lp.airnews.net>
X-Orig-Message-ID: <b3b2q8$j9k@library2.airnews.net>
References: <1d13e1b4.0302200006.70207b86@posting.google.com>
 <9d795v0h3qa2922u8vodfhpfvprpre6ak2@4ax.com>
 <1d13e1b4.0302200720.9666350@posting.google.com> <3E5517AE.1040003@acm.org>
 <3E553C5E.7B2850FD@tsoft.com> <3E557F4C.1010101@acm.org>
 <3E56AE14.9B5F31A@tsoft.com> <x7vd6lji3b8.fsf@smaug.pushface.org>
Abuse-Reports-To: abuse at airmail.net to report improper postings
NNTP-Proxy-Relay: library2.airnews.net
NNTP-Posting-Time: Sun Feb 23 12:10:16 2003
NNTP-Posting-Host: !_kKs1k-XXNHF+n (Encoded at Airnews!)
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200
Xref: archiver1.google.com comp.lang.ada:34483
Date: 2003-02-23T11:55:37-06:00
List-Id: <comp.lang.ada>

It can.

Some years ago, I had occasion to do a pixel blob coloring routine, in C,
that did 8-way connectivity.  The first version used a subroutine.  Runtime
was absolutely unacceptable for the application.  The call/return and
parameter passing time dominated.  The second version used a C macro, and
was fast enough.

I used a macro because I wanted the source code to be HUMAN-READABLE.
Physically inlining the code, without the macro, would have been a lot less
readable.

"Simon Wright" <simon@pushface.org> wrote in message
news:x7vd6lji3b8.fsf@smaug.pushface.org...
> Yuri <yuri@tsoft.com> writes:
>
> > I agree mostly, but there could be projects where performance is
> > critical.
> >
> > If rate of processing is low than performance is no issue. But if
> > say you process real-time video higher-performance processor may
> > make project cost-inefficient.
>
> Many programmes have some time-critical areas. But it's not common (in
> my experience) for something like parameter passing style to have much
> impact, unless it's completely bizarre (passing 1MB arreays by copy
> would count as bizarre!) More often it's very localized, and better
> algorithms will make much more difference.