Can I use dapper-dot-net with Entity Framework?

I am trying to use dapper-dot-net to speed up some area of my asp.net mvc application. I am using EF5 Code first also.

Since dapper-dot-net is just some extensions for IDbConnection, can i just use

DbContext.Database.Connection 

to use dapper-dot-net? I test it is working. However, i am not sure this is the right way to use it? Especially, when I use that way, will Entity Framework still has some impact that could hurt the performance?