Pydantic vs. Dataclasses speed comparison
· 6 min read
While both Pydantic models and Python dataclasses serve to structure data, their performance characteristics are significantly different. The key distinction lies in when and how validation occurs. Dataclasses rely on simple Python object initialization, while Pydantic executes a comprehensive validation and coercion pipeline on every instantiation.
The clear winner in terms of raw execution speed is the Python Dataclass.