bvh wrote: > On Fri, May 02, 2008 at 03:37:57PM +0100, Richard Fairhurst wrote: >> The other one is that it would be good if the getway call, in > > Just curious : what does this call actually do in fact?
Just gets a way and its tags, and all its nodes and their tags. http://trac.openstreetmap.org/browser/sites/rails_port/app/ controllers/amf_controller.rb#L173 It's pretty similar to /api/0.5/way/<id>/full, it just predates it (and as Dave says it reprojects, largely for historical reasons). The performance issue is with Way.find(wayid). This is several times slower than the equivalent SQL: SELECT latitude*0.0000001 AS latitude,longitude*0.0000001 AS longitude,current_nodes.id,tags,visible FROM current_way_nodes,current_nodes WHERE current_way_nodes.id=#{id} AND current_way_nodes.node_id=current_nodes.id ...I guess because it's creating Rails objects for all the nodes along the way, or something. Because Potlatch calls this for every single way, there's a pretty big performance hit. cheers Richard _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/dev
