mini-profiler is a simple but effective mini-profiler for ASP.NET MVC 3. The core here is a single assembly, with an example MVC project to show usage.
The profiler includes powerful and comprehensive database profiling capabilities. To enable wrap your database connection with a profiling connection.
The built in database profiler support any kind of DbConnection. It also supports Entity Framework and Linq-2-SQL.
MVC Mini Profiler was designed by the team at Stack Overflow. It is in production use there and on the Stack Exchange family of sites.