ZFS v15 slowness

[Pawel Jakub Dawidek]

On Fri, Jul 23, 2010 at 09:35:00AM +0200, Martin Matuska wrote:
>  Hi Pawel and Xin,
> 
> I have a user report and I can confirm myself of ZFS v15 acting slower
> than before the import on several systems.
> I would therefore like to propose the combined stat() and rrwlock
> speedup patch as this has noticeable impact on this issue in my tests
> and the overall impression of system responsiveness.

Of course speed up is very welcome, but as I read it v15 is slower than
v14 for some unknown reason. So of course getting more optimizations is
desirable, but not really related to why v15 is slower than v14.
Is my understanding correct? What kind of performance problems do you
observe?

-- 
Pawel Jakub Dawidek                       http://www.wheelsystems.com
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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