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Date:      Tue, 25 Nov 2008 21:46:35 +0100
From:      "Ivan Voras" <ivoras@freebsd.org>
To:        "Adrian Chadd" <adrian@freebsd.org>
Cc:        freebsd-performance@freebsd.org
Subject:   Re: FreeBSD 7.1 BETA 2 vs Opensolaris vs Ubuntu performance
Message-ID:  <9bbcef730811251246nf39e825s95a25ae394948e06@mail.gmail.com>
In-Reply-To: <d763ac660811251202n5dafbbl896ad194435436a0@mail.gmail.com>
References:  <DE23C2B055DA4BC683BDCAA95FF7B736@multiplay.co.uk> <gggmbb$un6$1@ger.gmane.org> <20081125173657.GA50429@freebsd.org> <ggher5$qq0$2@ger.gmane.org> <d763ac660811251202n5dafbbl896ad194435436a0@mail.gmail.com>

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2008/11/25 Adrian Chadd <adrian@freebsd.org>:
> 2008/11/25 Ivan Voras <ivoras@freebsd.org>:
>
>>> I believe most of the synthetic numbers (mp3 encoding etc.) difference
>>> comes from the different version of gcc the different OS uses...
>>
>> You're very likely right. Ubuntu 8.10 has gcc 4.3.x - it could make for
>> the small difference in gzip and 7z compression performance.
>
> Well, that should be a reasonably easy thing to test and feed back to
> the author.

OTOH if the goal is to measure "operating system" performance, this
must also include the compiler, libraries and all. (for example, what
does Solaris default to nowadays? I think it ships with gcc but not as
default). The hold on gcc 4.3 in FreeBSD is, after all, political
(licencing).

If FreeBSD base ever switches to LLVM+clang, this means libc will be
compiled with a non-gcc compiler which will forever change the
performance for simple "real world" benchmarks.



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