I am developing this web mapping application using Django(GeoDjango), Openlayers and PostgreSQL(PostGIS plugin). It is quite good but when having a huge set of data(shapefile/rows in the table/polygons with multiple vertices) it is "laggy". Panning and browsing on the map and rendering of layers is too slow. I have read some articles about it that although Openlayers has no limitation in rendering a vector(feature) layer, the browser does. So, I decided to use GeoServer. Here's my framework for now: Before, I get my GeoJSON data from Django and rendered it directly using Openlayers but since it is, as I said "laggy" the visualization of the map now is from GeoServer (WMS). HUGE difference, in terms of its rendering performance. It is quite good but I need to learn more about tuning it and use native JAI for rendering images. And also, performing PostGIS queries(ST_Intersects, etc...) is slow, I have tried using raw sql for it but still the response...
