ows layer getSRS should be cached because some layers can have many (Geoserver)
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Key: GEOT-959
URL: http://jira.codehaus.org/browse/GEOT-959
Project: GeoTools
Issue Type: Improvement
Components: ext wms
Affects Versions: 2.2.0
Reporter: Jesse Eichar
Assigned To: Richard Gould
Fix For: 2.2.1
Attachments: srs.patch
When rendering many WMS layers that come from Geoserver the getSRS method is
VERY slow because Geoserver can server up over 2000 CRSs. So consider a map
with 40 layers. getSRS is called at least 2 times per layer per pan in uDig
(trust me its true). Creating the sortedSet 40*2*(2000log(2000)) = 1,760,000
operations just to obtains the CRSs then they have to be searched for the CRS
that is being used... On 40 layer the searching takes nearly 20 seconds on a
Dual core chip.
So I'm attaching a patch that caches the CRSs in memory so they are only
obtained once. I have found a huge speed improvement doing this.
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