I have doubt about performance of web site.

Question

I have doubt about performance.

 

I want to develop a responsive website, fast execution in asp.net. 

 

I use bootstrap for responsive website. SQL and PL/sql for data base. Java script, Jquery for validation. asp asp.net for server side

 

80% interact with data base all drop down list fill from data base

 

what effect happn if I use asp.net server side control and validate that control on client side using JavaScript, jQuery and then sent data to server.  

 Or

if I use HTML control and validate that control on client side using JavaScript, jQuery and then sent data to server usnig "JSON"

 

who is give me  better performance.