Hi David,
Are there any guidelines that I can follow in order to get the fast path?
I don’t know what I’m doing that’s so unusual to makes performance suffer so
massively.
If there’s no heuristic, could it be a JVM flag?
Simon Hartley
From: David Winslow [mailto:dwins...@boundlessgeo.com]
Sent: 16 May 2014 14:48
To: Simon Hartley
Cc: Jody Garnett; Andrea Aime; geoserver-users@lists.sourceforge.net
Subject: Re: [Geoserver-users] SLD Alternatives
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<mailto: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<mailto:jody.garn...@gmail.com>]
Sent: 14 May 2014 21:03
To: Andrea Aime
Cc: Simon Hartley;
geoserver-users@lists.sourceforge.net<mailto: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<mailto:andrea.a...@geo-solutions.it>> wrote:
On Wed, May 14, 2014 at 3:18 PM, Simon Hartley
<shart...@airdata.co.uk<mailto: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
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