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perf: build model validators on first use instead of at import #2844

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copybara-service merged 1 commit into from
Aug 11, 2026
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perf: build model validators on first use instead of at import #2844

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5 changes: 5 additions & 0 deletions google/genai/_common.py
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Original file line number Diff line number Diff line change
Expand Up @@ -559,6 +559,11 @@ class BaseModel(pydantic.BaseModel):
ser_json_bytes='base64',
val_json_bytes='base64',
ignored_types=(typing.TypeVar,),
# Build each model's validator and serializer on first use rather than
# at import. `types` defines several hundred models and any one caller
# touches a small fraction of them, so building them all up front is
# most of what importing this package costs.
defer_build=True,
)

@pydantic.model_validator(mode='before')
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