FYI, this commit:
mleslie * r2634 /trunk/lwgeom/ (6 files):
Added a 1D rtree for polygon segment indexing, and tied the index
into the point
in polygon short-circuit of the contains, within, intersects and
disjoint
methods. Added an index cache to the comparitor methods to save index
build
Should cause the above predicates in the point/polygon case to be
blazingly fast now, not for individual cases, but for repeated tests
(as in a spatial join situation). Similar improvements to the
general geometry/geometry case are going into JTS now, and will be
available for PostGIS/JTS shortly thereafter. General GEOS
availability will have to wait for a porting update.
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