The performance of the CSS translator is highly dependent on not just the
size of the CSS style, but also the nature of the filters involved. In the
time frame you mention (GeoServer 2.2.5 to 2.3) I made some changes to the
algorithm that traded off performance in some cases for others. Overall it
is an improvement (in my estimation) but I'm aware there are some classes
of input that suffered. It would be nice to fall back on the old approach
in those cases but at the time I wasn't able to think of a good heuristic.
The new approach introduces a preprocessing step before computing the
viable combinations of CSS rules, perhaps we could instrument that somehow
and fall back to the old approach if it is taking too long.
In either case, the CSS translator itself would definitely become a
bottleneck far before the SLD renderer does, even with the giant SLD output
from the CSS translator.
On Thu, May 15, 2014 at 5:53 AM, Simon Hartley <shart...@airdata.co.uk>wrote:
> When I compare GeoCSS 0.7.2 to 0.7.5 by theselves from Github, the
> conversion speed of the latter version is 15 times slower.
>
>
>
> Simon Hartley
>
>
>
>
>
> *From:* Jody Garnett [mailto:jody.garn...@gmail.com]
> *Sent:* 14 May 2014 21:03
> *To:* Andrea Aime
> *Cc:* Simon Hartley; geoserver-users@lists.sourceforge.net
>
> *Subject:* Re: [Geoserver-users] SLD Alternatives
>
>
>
> It was not clear to me what the "speed issues" were. Speed in conversion,
> or resulting rendering speed from the generated styles.
>
>
> Jody Garnett
>
>
>
> On Wed, May 14, 2014 at 7:27 AM, Andrea Aime <andrea.a...@geo-solutions.it>
> wrote:
>
> On Wed, May 14, 2014 at 3:18 PM, Simon Hartley <shart...@airdata.co.uk>
> wrote:
>
> Hi,
>
>
>
> Does anyone have any recommendations for easily building and maintaining
> SLD styles?
>
> We’ve tried using the GeoServer CSS extension and were initially happy
> with it, but we’re going to have to abandon it after major speed issues.
>
>
>
> You could also consider sponsoring a speedup of the css->sld conversion ;-)
>
>
>
> Cheers
>
> Andrea
>
>
>
> --
>
> ==
>
> Meet us at GEO Business 2014! in London! Visit http://goo.gl/fES3aK
>
> for more information.
>
> ==
>
>
>
> Ing. Andrea Aime
>
> @geowolf
>
> Technical Lead
>
>
>
> GeoSolutions S.A.S.
>
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>
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>
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>
> phone: +39 0584 962313
>
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>
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>
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>
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>
>
>
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Boundless - http://boundlessgeo.com/
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