A comprehensive guide to EF Core performance optimization in .NET 10, covering ten key techniques: using AsNoTracking() for read-only queries, compiled queries for hot paths, compiled models for large schemas, fixing N+1 problems with eager loading, AsSplitQuery() to avoid cartesian explosion, bulk operations with ExecuteUpdateAsync/ExecuteDeleteAsync, Select() projections to avoid over-fetching, proper DbContext lifetime management with IDbContextFactory, parameterized queries for plan cache reuse, and logging slow queries with Serilog. Includes a prioritized action plan and FAQ addressing common misconceptions.