Tested with a release binary and Swiss OSM roads in PostGIS at several zoom
levels (the higher, the less features), values in ms (average over at
least 100 queries):
Level | Before | After | % improvement
-------------------------------------------
7 | 37 | 36 | 2.7
6 | 41 | 38 | 7.32
5 | 48 | 46 | 4.17
4 | 70 | 64 | 8.57
3 | 114 | 109 | 4.39
Not much improvement (I'm quite dispointed, here), but not much change in
the code.
* layerFilterExpression
Return an additional filter, used in
WMS/GetMap, WMS/GetFeatureInfo, WFS/GetFeature to filter the features
* layerFilterSubsetString
Return an additional the subset string (typically SQL) filter.
Faster than the layerFilterExpression but not supported on all the
type of layer
* layerPermissions
Change the rights on the layer per user (known by the plugin)
Concern rights: publish, insert, update, delete.
Mostly used in WFS/Transaction, and the publish in all requests.
* authorizedLayerAttributes
Be able to show some attributes only for a subset of user
Used in: WMS/GetFeatureInfo, WFS/GetFeature
* allowToEdit
Be able to don't allow to edit a particular feature, in our case base
on the Geometry
Used in: WFS/Transaction
* cacheKey
Cache key to used to create the capabilities cache, "" for no cache,
shouldn't contains any "-", default to ""
