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Re: Nightly performance problem

From: Hans-Emil Skogh <Hans-Emil.Skogh_at_tritech.se>
Date: Tue, 3 Aug 2010 10:15:54 +0200

>>>>>>>> I just tried the latest nightly, and it is giving me some pretty
>>>>>>>> severe performance problems.
>>>> Don't forget that the nightly is built using WC-NG which is still
>>>> quite a lot slower than the 1.6 WC.
>>> Could be the reason. I really hope that the SVN guys gets a grip on the
>>> performance issues in the WC-NG code. Right now it's quite slow when working
>>> with big WC:s... :-/
>> Do you have any insight into the nature of your working copies which
>> might allow us to better understand where the bottlenecks are?
> A quick run of callgrind produces strong evidence that
> the problem is the presence of files and folders in
> the working copy.
> The core problem is that no equivalent to the caches
> in the old wc code has been introduced, yet. One way
> to fix that would be performing SQL queries on the
> folder level and passing the query results to the
> per-node functions. Once this is done, the performance
> should be close to 1.6, again. Today, we are 15x off - under LINUX. It may well be worse under Windows.

This is pretty bad, and sounds about right for what I'm experiencing. Maybe not 15x slower, but multiple times slower.
Hopefully it will get fixed soon...


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Received on 2010-08-03 10:20:00 CEST

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