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Date:      Mon, 25 Apr 2005 09:23:42 -0700
From:      Marcel Moolenaar <marcel@xcllnt.net>
To:        Kirill Ponomarew <krion@voodoo.oberon.net>
Cc:        Kris Kennaway <kris@obsecurity.org>
Subject:   Re: FreeBSD 6 is coming too fast
Message-ID:  <657be6bca0955ea1d1571a92f074e43f@xcllnt.net>
In-Reply-To: <20050425145206.GM91852@voodoo.oberon.net>
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> <20050425145206.GM91852@voodoo.oberon.net>

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On Apr 25, 2005, at 7:52 AM, Kirill Ponomarew wrote:

> 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.

Not to pick on you, Kirill, but rather in general:

That entirely depends on the optimization level and the configuration.
I measured a small degradation (<5%) at -O3 on ia64. So, let's find
out how the 25% compile-time performance improvement was achieved before
we use it as an argument in any discussion, shall we?

-- 
  Marcel Moolenaar         USPA: A-39004          marcel@xcllnt.net



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