EFBulkInsert

Provides an extension method over the Entity Framework DbContext for bulk insertion of entities.

BulkInsert<T>(IEnumerable<T> entities, int batchSize = 5000)

Allows fast insertion of entities in bulk with retrieval of the generated identity column.

Installation:

Package Manger

Install-Package EFBulkInsert -Version 0.4.0

.NET CLI

dotnet add package EFBulkInsert --version 0.4.0

PackageReference

<PackageReference Include="EFBulkInsert" Version="0.4.0" />

Usage:

dbContext.BulkInsert(entites);

dbContext.BulkInsert(entities, 10000); // bulk insert with batch size of 10000

Performance improvements

# of entities	BulkInsert	EF SaveChanges
1000	127 ms	493 ms
5000	153 ms	2573 ms
10000	191 ms	4214 ms
50000	485 ms	22542 ms
100000	871 ms	41374 ms
500000	3916 ms	N/A
1000000	7769 ms	N/A

Tests made with: SQL Server 2016, EntityFramework 6.1.3 and EFBulkExtensions 0.1.0.

Version history

v0.4.0 (2020-03-09)

• Added: Support for Entity Framework Core 3.1.0

v0.3.0 (2018-03-27)

• Added: Support for schemas
• Fixed: Inserting into tables without identity columns
• Fixed: Retrieving the table name from EF metadata

v0.2.0 (2017-05-17)

• Fixed: Support for transactions

v0.1.0 (2017-01-26)

• Initial release