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CI Nuget Nuget

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