Efficient way to do bulk insert/update with Entity Framework

Question

I have a list of entities and I want to insert them into a database. If the entity already exists in the database as is then it needs to be skipped. If its in the database b

Answer 1

I have made an extension for that https://efbulkinsert.codeplex.com/

and it is really simple to use

using(var context = new MyDbContext())
{
    context.BulkInsert(hugeCollectionOfEntities);
}