Exploring Discriminated Unions in Pydantic

The chapter delves into the concept of discriminated unions in Pydantic models, where discriminators like string or callable types are crucial for efficient validation. It discusses using discriminators for nested models to enhance error handling and performance, showcasing examples like cat and dog models with pet type fields. The chapter also explores performance optimization techniques in Pydantic, such as 'skip validation' annotations and utilizing SIMD for faster JSON parsing.