Asp.Net core kestrel resources used on server

Hello I have a question, I am using Asp.Net Core RC2 and using the postgres database therefore using Npgsql connections. I also used SQLConnections and seen that it is much more efficent. My question is that since Asp.Net core is using the same system as Node.Js which is Libuv and kestrel wouldn't that be more efficient and use less server resources than traditional asp.net where a new thread is created for every request ? I am asking this because I am thinking of using MSSQL with Asp.net core since I think I would be able to get more resources out of my server .