Explain DbContext Pooling and its performance benefits.

DbContext Pooling reuses DbContext instances instead of creating a new one for each request, reducing memory allocations and GC pressure.

In ASP.NET Core, AddDbContext creates a scoped instance per request. Creating a DbContext involves allocating tracking structures and services. AddDbContextPool maintains a pool of pre-created contexts. When a request ends, the context's state is reset and returned to the pool.