Window Services to improve speed

Question

I'm working on a web application where I've to interact with database again and again. And database is also very bulky some tables having more than 50000 records. And records from these tables are being used to view in other pages very frequently. And in fetchig records it's taking normal time but as per client requirement it should be faster and faster as fast as possible. So i'm looking for an any way through which fetching records will be faster and fastest as possible. Someone has suggested me to go with WINDOW SERVICES to improve the speed in my web application.