performance tests conducted on 7.04, 7.10, 8.04, 8.10rc
tim.hawkins at mac.com
Tue Oct 28 17:32:57 GMT 2008
This is a very subjective comment, but:
I have been playing with fedora 10 and ubuntu 8.10 on my netbook,
(ACER aspire one, 1.5G Ram Atom CPU 1.6Ghz, 120G SATA drive,
intel 945GE graphics chipset) .
Fedora 10 is significantly faster on desktop operations than intrepid,
given that its running virtually the same kernel (2.6.27.x), and Xorg
7.4 and the same intel 915 drivers, I am at a loss to explain the
difference. Its not just subjective glxgears delivers 382fps on ubuntu
8.10 and 560 fps on Fedora 10. I have tried with and without
INTEL_BATCH=1 enabled on both. Both have DRI enabled.
Networking also feels snappier although I dont have an measurements,
so that is subjective.
In general the Fed 10 install feels a lot snappier.
It might be worth looking at the build defaults for the packages and
seeing if there is any significant difference.
On 28 Oct 2008, at 16:27, Kees Cook wrote:
> On Tue, Oct 28, 2008 at 11:02:37AM -0500, Chris Cheney wrote:
>> Since they only tested on i386 this (aiui) could at least be
>> explained by the security enhancements made to Ubuntu. I don't know
>> all has been changed but I believe at least -PIE was added to
>> at some point. There was discussion about this at a UDS and the fact
>> this would cause some slowdown for i386 in particular since it
>> have enough registers.
> Nothing they tested has been built with PIE. We intentionally only
> built a few network services with PIE, so that won't account for
> There were some compiler defaults changed (e.g.
> _FORTIFY_SOURCE=2), but
> that's unlikely to make such a difference in their test times. Most
> the checks are done at compile-time (which could certainly have
> contributed to the compiler slow-down, but I would bet that's mostly
> due to the 4.3 compiler, as mentioned earlier).
>  https://wiki.ubuntu.com/Security/HardeningWrapper#Early%20PIE
>  https://wiki.ubuntu.com/CompilerFlags
> Kees Cook
> Ubuntu Security Team
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