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10 EF Core Performance Mistakes (and How to Fix Them) in .NET 10

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A practical breakdown of 10 common EF Core performance mistakes that pass tests in development but degrade under production load. Covers N+1 queries, returning full entities instead of projections, missing AsNoTracking on read-only queries, lazy loading in production, cartesian explosion from multiple Includes, filtering after materialization, loading entities for bulk updates/deletes, missing pagination, missing database indexes, and skipping compiled queries on hot paths. Each mistake includes the problematic code pattern, the correct fix with code samples, and benchmark context. Also covers what EF Core 10 and .NET 10 improve out of the box, plus a decision matrix for choosing which fix to apply first.

•20m read time•From codewithmukesh.com
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Table of contents
ASP.NET Core CRUD with EF Core 10What Counts as an EF Core Performance Mistake?LeftJoin and RightJoin in .NET 10 with EF Core 10How to Spot These in Your CodebaseMistake 1: The N+1 Query ProblemEF Core Relationships - One-to-One, One-to-Many, Many-to-ManyMistake 2: Returning Full Entities Instead of ProjectionsMistake 3: Forgetting AsNoTracking on Read-Only QueriesConcurrency Control and Optimistic Locking in EF CoreTracking vs. No-Tracking Queries in EF CoreMistake 4: Leaving Lazy Loading Enabled in ProductionMistake 5: Cartesian Explosion from Multiple IncludesMistake 6: Filtering After MaterializationMistake 7: Loading Entities Just to Update or Delete Them in BulkBulk Operations in EF Core 10 - Benchmarking Insert, Update, and Delete StrategiesMistake 8: No Pagination on List EndpointsPagination, Sorting, and Searching in ASP.NET Core APIsMistake 9: Missing Database Indexes on Filtered or Joined ColumnsConfiguring Entities with Fluent API in EF CoreMistake 10: Not Using Compiled Queries on Hot PathsCompiled Queries in EF Core 10 - Boosting Performance for Hot Query PathsWhen to Use What: The Decision MatrixHybridCache in ASP.NET Core for EF Core ReadsWhat EF Core 10 Improves Out of the BoxKey TakeawaysFrequently Asked QuestionsTroubleshooting Common IssuesWrap-Up
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