Entity Framework Classic Bulk SaveChanges
The EF Bulk SaveChanges feature let you save thousands of entities in your database efficiently.
This feature is provided by the library EF Extensions (Included with EF Classic). EF Extensions is used by over 2000 customers all over the world and supports all Entity Framework versions (EF4, EF5, EF6, EF Core, EF Classic).
context.Customers.AddRange(listToAdd); // add context.Customers.RemoveRange(listToRemove); // remove listToModify.ForEach(x => x.DateModified = DateTime.Now); // modify // Easy to use context.BulkSaveChanges(); // Easy to customize context.BulkSaveChanges(bulk => bulk.BatchSize = 100);
|Operations||1,000 Entities||2,000 Entities||5,000 Entities|
|SaveChanges||1,200 ms||2,400 ms||6,000 ms|
|BulkSaveChanges||175 ms||325 ms||750 ms|
|BulkSaveChanges(false)||125 ms||200 ms||450 ms|
Performance may differ from a database to another. A lot of factors might affect the benchmark time such as index, column type, latency, throttling, etc.
Why BulkSaveChanges is faster than SaveChanges?
ChangeTracker to detect and persist changes automatically is great! However, it leads very fast to some problems when multiple entities need to be saved.
SaveChanges method makes a database round-trip for every change. So, if you need to insert 10000 entities, then 10000 database round-trips will be performed which is INSANELY slow.
BulkSaveChanges works exactly like
SaveChanges but reduces the number of database round-trips required to help significantly improve the performance.
Why BulkSaveChanges(false) is faster than BulkSaveChanges?
BulkSaveChanges method uses a lot of methods coming from
Entity Framework. When passing
false in parameter, some logic such as identity propagation use custom logic that has been optimized. Learn more about EF Extensions - Improve BulkSaveChanges
More documentation can be found here: EF Extensions - Bulk SaveChanges