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Date:      Mon, 25 Apr 2005 16:52:06 +0200
From:      Kirill Ponomarew <krion@voodoo.oberon.net>
To:        Scott Long <scottl@samsco.org>
Cc:        Mike Tancsa <mike@sentex.net>
Subject:   Re: FreeBSD 6 is coming too fast
Message-ID:  <20050425145206.GM91852@voodoo.oberon.net>
In-Reply-To: <426D0252.5050805@samsco.org>
References:  <6.2.1.2.0.20050424204611.072105a0@64.7.153.2> <20050425010242.GA44110@xor.obsecurity.org> <6.2.1.2.0.20050424210422.03d22990@64.7.153.2> <20050425014453.GA59981@xor.obsecurity.org> <426C6B1D.3040704@elischer.org> <20050425061459.GA33247@xor.obsecurity.org> <20050425062106.GB91852@voodoo.oberon.net> <426CF3DE.4000409@samsco.org> <20050425144108.GK91852@voodoo.oberon.net> <426D0252.5050805@samsco.org>

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On Mon, Apr 25, 2005 at 08:44:34AM -0600, Scott Long wrote:
> >No, I'm not going to do it because of lack of knowledge, there are
> >people who have more experience with it than me.
> >
> Well, as I said in another email, switching to GCC 4 just because of
> dubious "25% faster" (faster at what?  compiling?  resulting generated
> code?  crashing?) claims in the changelog is not a terribly good
> reason =-)

25% faster to compile the code, not running it.

> It seems that every time GCC claims to get "faster", our
> buildworld times increase by 10%.  Maybe the generated code is
> better and faster, but it's no secret that gcc spends a lot more
> CPU cycles on code genreation and optimization than it did in the
> 2.x series.  Note also that the GCC 4.0 changelog mentions that
> the -O0 flag is faster; that's wonderful, but has no practical
> value to real people.

-Kirill



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