BulkInsert
When you want to insert hundreds, thousands, or millions of entities using SaveChanges() method, you will notice that your application performance is INSANELY slow.
- The
SaveChanges()requires one database round-trip for every entity to insert. - For example, if you need to insert 10000 entities, then 10000 database round-trips will be performed and your application suffers from performances issues.
BulkInsert
Entity Framework Classic provides an extension method BulkInsert() which requires the minimum database round-trips as compared to SaveChanges().
Performance Comparisons
| Operations | 1,000 Entities | 2,000 Entities | 5,000 Entities |
|---|---|---|---|
| SaveChanges | 1,000 ms | 2,000 ms | 5,000 ms |
| BulkInsert | 6 ms | 10 ms | 15 ms |
Example
The following example, add list of authors to the database using BulkInsert method.
using (var context = new BookStore())
{
List<Author> authors = GetAuthorsList();
context.BulkInsert(authors);
}