After waiting for long time, CISCO has added new data structuted named CSSR in CEF which is actually going to enhance the performance of CEF. It is available on 12.4(20)T platform.

Secret Of CSSR: Actually CEF uses adjacency table for next-hop and mac-address resolution. If you are having n entries in the routing table with the same next-hop then for every entry it has to maintain the adjacency table which acquires more space. By adding new data structure into CEF, it will save only a single entry in the adjacency table for all the routes who are having same next-hop address.