Speed up LINQ inserts

Question

I have a CSV file and I have to insert it into a SQL Server database. Is there a way to speed up the LINQ inserts?

I\'ve created a simple Repository method to save a rec

Answer 1

I suspect it isn't the inserting or updating operations that are taking a long time, rather the code that determines if your offer already exists:

Offer dbOffer = this.db.Offers.SingleOrDefault (
         o => o.offer_id == offer.offer_id);

If you look to optimise this, I think you'll be on the right track. Perhaps use the Stopwatch class to do some timing that will help to prove me right or wrong.

Usually, when not using Linq-to-Sql, you would have an insert/update procedure or sql script that would determine whether the record you pass already exists. You're doing this expensive operation in Linq, which certainly will never hope to match the speed of native sql (which is what's happening when you use a SqlCommand and select if the record exists) looking-up on a primary key.