⚡️ Speed up function _field_name_for_signature by 37% in pydantic/_internal/_signature.py

[codeflash-ai]

📄 _field_name_for_signature() in pydantic/_internal/_signature.py

📈 Performance improved by 37% (0.37x faster)

⏱️ Runtime went down from 42.3 microseconds to 30.9 microseconds

Explanation and details

To optimize the runtime and memory usage of the given Python function, we can inline the _alias_if_valid function to avoid the overhead of additional function calls and reduce the redundancy. Here's the optimized version of the code.

Explanation.

1. Inlining _alias_if_valid Function: By inlining the code of _alias_if_valid directly into _field_name_for_signature, we eliminate the overhead of multiple function calls and simplify the logic.
2. Conditional Checks: Add checks directly within the return statement to reduce unnecessary temporary variables.

These changes should help in reducing the runtime and memory overhead of the function while maintaining the same functionality and returned values.

Correctness verification

The new optimized code was tested for correctness. The results are listed below.

🔘 (none found) − ⚙️ Existing Unit Tests

✅ 0 Passed − 🌀 Generated Regression Tests

(click to show generated tests)

# imports
# function to test
from __future__ import annotations

from typing import Any

import pytest  # used for our unit tests
from pydantic import FieldInfo
from pydantic._internal._signature import _field_name_for_signature
from pydantic._internal._utils import is_valid_identifier


# unit tests
class TestFieldNameForSignature:
    def test_valid_alias(self):
        # Test case where alias is a valid identifier
        field_info = FieldInfo(alias='validAlias', validation_alias=None)
        assert _field_name_for_signature('name', field_info) == 'validAlias'

    def test_valid_validation_alias(self):
        # Test case where validation_alias is a valid identifier
        field_info = FieldInfo(alias=None, validation_alias='validValidationAlias')
        assert _field_name_for_signature('name', field_info) == 'validValidationAlias'

    def test_both_valid_aliases(self):
        # Test case where both alias and validation_alias are valid identifiers
        field_info = FieldInfo(alias='validAlias', validation_alias='validValidationAlias')
        assert _field_name_for_signature('name', field_info) == 'validAlias'

    def test_invalid_alias(self):
        # Test case where alias is not a valid identifier
        field_info = FieldInfo(alias='invalid-alias', validation_alias=None)
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_invalid_validation_alias(self):
        # Test case where validation_alias is not a valid identifier
        field_info = FieldInfo(alias=None, validation_alias='invalid-validation-alias')
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_both_invalid_aliases(self):
        # Test case where both alias and validation_alias are not valid identifiers
        field_info = FieldInfo(alias='invalid-alias', validation_alias='invalid-validation-alias')
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_non_string_alias(self):
        # Test case where alias is not a string
        field_info = FieldInfo(alias=123, validation_alias=None)
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_non_string_validation_alias(self):
        # Test case where validation_alias is not a string
        field_info = FieldInfo(alias=None, validation_alias=456)
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_both_non_string_aliases(self):
        # Test case where both alias and validation_alias are not strings
        field_info = FieldInfo(alias=123, validation_alias=456)
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_none_alias(self):
        # Test case where alias is None
        field_info = FieldInfo(alias=None, validation_alias=None)
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_none_validation_alias(self):
        # Test case where validation_alias is None
        field_info = FieldInfo(alias=None, validation_alias=None)
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_both_none_aliases(self):
        # Test case where both alias and validation_alias are None
        field_info = FieldInfo(alias=None, validation_alias=None)
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_empty_string_alias(self):
        # Test case where alias is an empty string
        field_info = FieldInfo(alias='', validation_alias=None)
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_empty_string_validation_alias(self):
        # Test case where validation_alias is an empty string
        field_info = FieldInfo(alias=None, validation_alias='')
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_both_empty_string_aliases(self):
        # Test case where both alias and validation_alias are empty strings
        field_info = FieldInfo(alias='', validation_alias='')
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_empty_string_field_name(self):
        # Test case where field_name is an empty string
        field_info = FieldInfo(alias='validAlias', validation_alias='validValidationAlias')
        assert _field_name_for_signature('', field_info) == 'validAlias'

    def test_all_empty_strings(self):
        # Test case where field_name, alias, and validation_alias are all empty strings
        field_info = FieldInfo(alias='', validation_alias='')
        assert _field_name_for_signature('', field_info) == ''

    def test_large_scale_alias(self):
        # Test case with large alias
        field_info = FieldInfo(alias='a'*1000, validation_alias=None)
        assert _field_name_for_signature('name', field_info) == 'a'*1000

    def test_large_scale_validation_alias(self):
        # Test case with large validation_alias
        field_info = FieldInfo(alias=None, validation_alias='b'*1000)
        assert _field_name_for_signature('name', field_info) == 'b'*1000

    def test_large_scale_all(self):
        # Test case with large field_name, alias, and validation_alias
        field_info = FieldInfo(alias='b'*1000, validation_alias='c'*1000)
        assert _field_name_for_signature('a'*1000, field_info) == 'b'*1000

    def test_special_characters_alias(self):
        # Test case where alias contains special characters
        field_info = FieldInfo(alias='alias_with_special_char, validation_alias=None)
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_special_characters_validation_alias(self):
        # Test case where validation_alias contains special characters
        field_info = FieldInfo(alias=None, validation_alias='validation_alias_with_special_char)
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_both_special_characters_aliases(self):
        # Test case where both alias and validation_alias contain special characters
        field_info = FieldInfo(alias='alias_with_special_char, validation_alias='validation_alias_with_special_char)
        assert _field_name_for_signature('name', field_info) == 'name'

    def test_mixed_valid_invalid_alias(self):
        # Test case where alias is valid but validation_alias is invalid
        field_info = FieldInfo(alias='validAlias', validation_alias='invalid-validation-alias')
        assert _field_name_for_signature('name', field_info) == 'validAlias'

    def test_mixed_invalid_valid_alias(self):
        # Test case where alias is invalid but validation_alias is valid
        field_info = FieldInfo(alias='invalid-alias', validation_alias='validValidationAlias')
        assert _field_name_for_signature('name', field_info) == 'validValidationAlias'

✅ 83 Passed − ⏪ Replay Tests

[iusedmyimagination]

Inclining the helper function and returning faster is intriguing. None of the generated tests passed (problem with FieldInfo?), but the replay tests 83 replay tests did. I’d take this if the benchmarking results were sound.