GeoDjango + GeoServer + Openlayers Combo!

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:

web mapping framework

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 time is unacceptable.

Few more notes, I am still using Django 1.6.3, Openlayers 2.14, PostgreSQL 9.3 with PostGIS and GeoServer 2.7.2. Of course, have some plan in upgrading it but I don't know when. HAHA

The project is under development but you can visit it with this link.
Thanks to my two friends for helping me in deploying it. HAHA :)

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