entity-framework-4.3

My EF 4.3.1 model has 200-odd tables. Initial startup is horrible, several minutes. A DotTrace-captured profile implies some terrible algorithm/scalability choices deep in the framework, as evidenced by the millions of calls to a number of methods down there and the 36 million IEnumerable.Contains() calls. Here is a snippet, this is all triggered by the first query done on the database (future queries don't do this and are fine). What can I do to my model to make this less painful? Can I precompile this somehow? Better, can the EF team please address these issues or open source the framework

While we mostly use fluent configuration for our code-first POCOs, we have found it useful to use data annotations for things like the table name, PKs, etc. since it makes it easier for non-EF components that don't have a reference to the ObjectContext to interact with these entities. In our experience, it seems that the two configuration styles can be mixed freely, with fluent configuration overriding DataAnnotations. Is this documented anywhere? Is there any risk to doing this mixed configuration? We are currently using EF 4.3.1 I personally haven't ran into any issues with mixing the code

I am using Entity Framework 4.3 and using Code Fist. I have a class public class User { public int UserId{get;set;} public string UserName{get;set;} } How do I tell Entity Framework that UserName has to be unique when creating database table? I would prefer to use data anotations instead of configuration file if possible. In Entity Framework 6.1+ you can use this attribute on your model: [Index(IsUnique=true)] You can find it in this namespace: using System.ComponentModel.DataAnnotations.Schema; If your model field is a string, make sure it is not set to nvarchar(MAX) in SQL Server or you will