Paul Ramsey created GEOS-5027:
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Summary: ST_Simplify in the PostGIS driver for performance
Key: GEOS-5027
URL: https://jira.codehaus.org/browse/GEOS-5027
Project: GeoServer
Issue Type: Improvement
Components: PostGIS
Affects Versions: 2.1.3
Reporter: Paul Ramsey
Assignee: Andrea Aime
Priority: Minor
By wrapping the geometry column in the SQL generated by the driver in an "appropriate" call to ST_Simplify, rendering can be sped up by avoiding pushing un-needed data through the pipes to GeoServer. This approach has been tested on MapNik and seen 75% increases in speed for complex inputs. The "appropriate" call will need to figure out a simplification parameter based on the size and bounds of the output image being generated.
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