How to optimize EF Core performance?

Short answer: Use .AsNoTracking() for read-only queries. Avoid over-fetching: only select needed columns (Select). Use eager loading wisely (Include). Minimize round trips by batching operations. Use compiled queries for repeated query patterns.

Real-world example (ShopNest)

ShopNest’s order service uses EF Core to save an Order and its line items in one SaveChangesAsync() call inside a transaction.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.