C# - Inserting multiple rows using a stored procedure

Question

I have a list of objects, this list contains about 4 million objects. there is a stored proc that takes objects attributes as params , make some lookups and insert them into tab

Answer 1

You might consider dropping any indexes you have on the table(s) you are inserting into and then recreating them after you have inserted everything. I'm not sure how the bulk copy class works but if you are updating your indexes on every insert it can slow things down quite a bit.