BulkMerge allows you to improve EF performance by merging multiples entities with bulk operations.

Why BulkMerge?

For HUGE performance gains, Entity Framework makes one database round-trip for each entity to insert/update.

So if you want to modify 10,000 entities, 10,000 database round trip will be required which is INSANELY slow. To use BulkMerge, you will need to use a third-party library.

Operations 1,000 Entities 2,000 Entities 5,000 Entities
BulkMerge 65 ms 80 ms 110 ms
SaveChanges 1,000 ms 2,000 ms 5,000 ms


// using Z.EntityFramework.Extensions; // Don't forget to include this.

// Easy to use

// Easy to customize
context.BulkMerge(list, bulk => bulk.BatchSize = 100);

Supported Libraries

Library Type EF Version Support Doc Features
Z.EntityFramework.Extensions PRO EF6 < 1 Day Yes Bulk SaveChanges
Bulk Insert
Bulk Update
Bulk Delete
Bulk Merge