⚡️ Speed up visit_structured_query() by 8% in libs/langchain/langchain/retrievers/self_query/timescalevector.py

[codeflash-ai]

📄 visit_structured_query() in libs/langchain/langchain/retrievers/self_query/timescalevector.py

📈 Performance went up by 8% (0.08x faster)

⏱️ Runtime went down from 9.00μs to 8.30μs

Explanation and details

(click to show)

Firstly, we will define a static dictionary of the class methods in the accept method to avoid repeated costly calls to getattr and _to_snake_case. Secondly, we will move the kwargs initialization outside the if condition in visit_structured_query. This is because Python actually creates an extra temporary dictionary when you use dictionary comprehensions. Given your conditions, we can simplify this and avoid creating an extra temporary dictionary.

Here is the optimized version.

With this optimization, we have reduced the amount of time spent on function calls and dictionary manipulation.

Correctness verification

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

✅ 0 Passed − ⚙️ Existing Unit Tests

✅ 0 Passed − 🎨 Inspired Regression Tests

✅ 7 Passed − 🌀 Generated Regression Tests

(click to show generated tests)

# imports
import pytest  # used for our unit tests
from typing import Any, Tuple

# Assuming the existence of the following classes based on the function provided
class Visitor:
    pass

class StructuredQuery:
    def __init__(self, query: str, filter: Any = None):
        self.query = query
        self.filter = filter

    def accept(self, visitor: Visitor) -> Any:
        return visitor.visit_structured_query(self)
from langchain.retrievers.self_query.timescalevector import TimescaleVectorTranslator
# Helper class for testing
class MockFilter:
    def accept(self, visitor: Visitor) -> dict:
        return {"mock_key": "mock_value"}

# unit tests

# Test normal case with a filter
def test_visit_with_filter():
    translator = TimescaleVectorTranslator()
    query = "SELECT * FROM table"
    filter = MockFilter()
    structured_query = StructuredQuery(query=query, filter=filter)
    result_query, result_kwargs = translator.visit_structured_query(structured_query)
    assert result_query == query
    assert result_kwargs == {"predicates": {"mock_key": "mock_value"}}

# Test normal case without a filter
def test_visit_without_filter():
    translator = TimescaleVectorTranslator()
    query = "SELECT * FROM table"
    structured_query = StructuredQuery(query=query, filter=None)
    result_query, result_kwargs = translator.visit_structured_query(structured_query)
    assert result_query == query
    assert result_kwargs == {}

# Test edge case with an empty filter
@pytest.mark.parametrize("empty_filter", [None, [], {}])
def test_visit_with_empty_filter(empty_filter):
    translator = TimescaleVectorTranslator()
    query = "SELECT * FROM table"
    structured_query = StructuredQuery(query=query, filter=empty_filter)
    result_query, result_kwargs = translator.visit_structured_query(structured_query)
    assert result_query == query
    assert result_kwargs == {}

# Test error case with filter raising an exception
def test_visit_with_exception_raising_filter():
    class ExceptionRaisingFilter:
        def accept(self, visitor: Visitor) -> dict:
            raise ValueError("Error during filter processing")

    translator = TimescaleVectorTranslator()
    query = "SELECT * FROM table"
    filter = ExceptionRaisingFilter()
    structured_query = StructuredQuery(query=query, filter=filter)
    with pytest.raises(ValueError):
        translator.visit_structured_query(structured_query)

# Test invalid input case with non-StructuredQuery object
def test_visit_with_invalid_input():
    translator = TimescaleVectorTranslator()
    with pytest.raises(AttributeError):
        translator.visit_structured_query("not a StructuredQuery")

# Test StructuredQuery object lacking attributes
def test_visit_with_incomplete_structured_query():
    translator = TimescaleVectorTranslator()
    incomplete_query = StructuredQuery(query="SELECT * FROM table")
    delattr(incomplete_query, 'filter')
    with pytest.raises(AttributeError):
        translator.visit_structured_query(incomplete_query)

# Test integration with the Visitor pattern
def test_visit_with_nested_structured_query():
    translator = TimescaleVectorTranslator()
    nested_query = StructuredQuery(query="nested query")
    filter = StructuredQuery(query="SELECT * FROM table", filter=nested_query)
    structured_query = StructuredQuery(query="SELECT * FROM table", filter=filter)
    result_query, result_kwargs = translator.visit_structured_query(structured_query)
    assert result_query == "SELECT * FROM table"
    assert result_kwargs == {"predicates": ("SELECT * FROM table", {"predicates": "nested query"})}