damccorm opened a new pull request, #41061:
URL: https://github.com/apache/beam/pull/41061
### Description
Optimizes bytecode return-type inference and schema type translation during
pipeline graph construction:
1. **Cache opcode dispatch tables in
`trivial_inference.infer_return_type_func`
(`sdks/python/apache_beam/typehints/trivial_inference.py`):**
- Previously, `infer_return_type_func` imported `opcodes` and
`intrinsic_one_ops` and rebuilt the `simple_ops` dictionary (`{k.upper(): v for
k, v in opcodes.__dict__.items()}`) on every call.
- Hoists `_SIMPLE_OPS` and `_INT_ONE_OPS` to module-level cached tables
initialized once on first use.
2. **Fast-path primitive atomic types in
`SchemaTranslation.typing_to_runner_api`
(`sdks/python/apache_beam/typehints/schemas.py`):**
- Checks `PRIMITIVE_TO_ATOMIC_TYPE` at the top of `typing_to_runner_api`
before inspecting generic origin/dataclass/NamedTuple metadata (**1.26x
faster** schema field translation).
### Testing
- Verified with `pytest
sdks/python/apache_beam/typehints/trivial_inference_test.py
sdks/python/apache_beam/typehints/schemas_test.py`.
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