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| From | Eric Sosman <esosman@ieee-dot-org.invalid> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Small Variant Records in C |
| Date | 2011-12-19 09:24 -0500 |
| Organization | A noiseless patient Spider |
| Message-ID | <jcnhev$ff5$1@dont-email.me> (permalink) |
| References | (3 earlier) <cd16434c-8c43-4b2f-b293-b12ec9bc8d6f@o7g2000yqk.googlegroups.com> <jcltbr$pe8$1@dont-email.me> <59e2f8be-ff38-4ca1-ac7e-ce07c3018000@g41g2000yqa.googlegroups.com> <jcm1v5$mfa$1@dont-email.me> <jcm4fk$1g3$1@dont-email.me> |
On 12/18/2011 8:36 PM, BartC wrote:
> "Eric Sosman" <esosman@ieee-dot-org.invalid> wrote in message
> news:jcm1v5$mfa$1@dont-email.me...
>
>
>> This level of squeaky-cleanliness may seem obsessive, but
>> remember: RAM is getting slower every year (in comparison to CPU),
>> and compilers are getting more and more inventive about avoiding
>> RAM accesses in creative ways. Moderately dingy code that works
>> today may fail on the next compiler, or the next machine -- my tale
>> of woe happened on just one platform out of the seven our code ran
>> on at the time. Squeaky-clean is your defense against the future.
>
> But the product might be too slow to be successful (if you have to take
> a completely different, and less efficient, approach just so you can
> give the compiler a chance to optimise, and it might not even manage that).
A fan of "get the wrong answer quickly," are you?
Besides, in my experience an optimizer will do *at least* as well
with a cleanly-described program as with one that cuts corners. The
classic (and all-too-frequent) example is of the big program that is
mostly compiled with maximum optimization except for half a dozen
modules that the optimizer "gets wrong." Care go guess which side
the "wrong" is usually on?
--
Eric Sosman
esosman@ieee-dot-org.invalid
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Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-18 10:16 -0800
Re: Small Variant Records in C Seebs <usenet-nospam@seebs.net> - 2011-12-18 18:50 +0000
Re: Small Variant Records in C Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-12-18 15:00 -0500
Re: Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-18 12:23 -0800
Re: Small Variant Records in C Seebs <usenet-nospam@seebs.net> - 2011-12-18 21:15 +0000
Re: Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-18 14:13 -0800
Re: Small Variant Records in C Seebs <usenet-nospam@seebs.net> - 2011-12-19 00:26 +0000
Re: Small Variant Records in C "BartC" <bc@freeuk.com> - 2011-12-19 02:25 +0000
Re: Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-18 19:08 -0800
Re: Small Variant Records in C "BartC" <bc@freeuk.com> - 2011-12-19 17:24 +0000
Re: Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-19 11:43 -0800
Re: Small Variant Records in C Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-12-19 15:21 -0500
Re: Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-19 13:38 -0800
Re: Small Variant Records in C James Kuyper <jameskuyper@verizon.net> - 2011-12-19 16:48 -0500
Re: Small Variant Records in C Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-12-19 17:19 -0500
Re: Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-19 15:14 -0800
Re: Small Variant Records in C "BartC" <bc@freeuk.com> - 2011-12-19 21:44 +0000
Re: Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-19 14:02 -0800
Re: Small Variant Records in C Kaz Kylheku <kaz@kylheku.com> - 2011-12-19 18:38 +0000
Re: Small Variant Records in C jgk@panix.com (Joe keane) - 2012-01-04 03:52 +0000
Re: Small Variant Records in C Ian Collins <ian-news@hotmail.com> - 2012-01-04 20:25 +1300
Re: Small Variant Records in C Tim Rentsch <txr@alumni.caltech.edu> - 2012-01-25 15:53 -0800
Re: Small Variant Records in C Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-12-18 18:35 -0500
Re: Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-18 16:01 -0800
Re: Small Variant Records in C Seebs <usenet-nospam@seebs.net> - 2011-12-19 00:26 +0000
Re: Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-18 17:02 -0800
Re: Small Variant Records in C Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-12-18 19:53 -0500
Re: Small Variant Records in C "BartC" <bc@freeuk.com> - 2011-12-19 01:36 +0000
Re: Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-18 18:21 -0800
Re: Small Variant Records in C "BartC" <bc@freeuk.com> - 2011-12-19 02:52 +0000
Re: Small Variant Records in C Marco Devillers <marco.devillers@gmail.com> - 2011-12-18 19:17 -0800
Re: Small Variant Records in C Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-12-19 09:24 -0500
Re: Small Variant Records in C "BartC" <bc@freeuk.com> - 2011-12-19 17:18 +0000
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