Pydantic v2 performance boost:

In Simple Words: Pydantic v2 rewrote its validation engine in Rust (pydantic-core), delivering up to 17x faster JSON validation and strict type parsing.

python

from pydantic import BaseModel, Field, field_validator

class Product(BaseModel):
    title: str = Field(min_length=3)
    price: float = Field(gt=0)

    @field_validator('title')
    @classmethod
    def capitalize_title(cls, v: str) -> str:
        return v.title()

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