currently I am using
$.fn.yiiGridView.update(\"group-grid\");
to refresh cgridview after every 50 seconds. As I was examining this process in firebug each refresh operation takes 980ms. Isn’t this too long time considering my site is on localhost with database on same pc and each cgridview refresh operation is fetching only 4-5 rows from a table with 2 columns? Also no other operation related to database is going on during that period.