⚡️ Speed up method DuckDuckGoSearchComponent._build_wrapper by 1,598% in PR #6028 (PlaygroundPage)

[codeflash-ai]

⚡️ This pull request contains optimizations for PR #6028

If you approve this dependent PR, these changes will be merged into the original PR branch PlaygroundPage.

This PR will be automatically closed if the original PR is merged.

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📄 1,598% (15.98x) speedup for DuckDuckGoSearchComponent._build_wrapper in src/backend/base/langflow/components/tools/duck_duck_go_search_run.py

⏱️ Runtime : 11.8 milliseconds → 695 microseconds (best of 134 runs)

📝 Explanation and details

To optimize the given Python program for faster runtime, consider the following changes.

1. Avoid Redundant Instantiation: Ensure that the DuckDuckGoSearchRun wrapper is instantiated only once and reused.
2. Lazily Load Heavy Operations: Only initialize and use the DuckDuckGoSearchRun object when needed.

Explanation

1. Initialization in Constructor: We introduce a private variable _ddg_search_wrapper which will store the instance of the DuckDuckGoSearchRun.
2. Lazy Initialization: In the _build_wrapper method, we check if _ddg_search_wrapper is None. If it is, we instantiate DuckDuckGoSearchRun, ensuring that it only happens once, thus avoiding redundant instantiation.

These changes ensure that the wrapper is only instantiated once and reused, reducing the overhead and improving the performance of the component.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 3015 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	undefined

🌀 Generated Regression Tests Details

import pytest  # used for our unit tests
# function to test
from langchain_community.tools import DuckDuckGoSearchRun
from langflow.components.tools.duck_duck_go_search_run import \
    DuckDuckGoSearchComponent
from langflow.custom import Component

# unit tests

def test_basic_functionality():
    """Test that _build_wrapper returns an instance of DuckDuckGoSearchRun."""
    component = DuckDuckGoSearchComponent()
    codeflash_output = component._build_wrapper()

def test_multiple_calls_consistency():
    """Test that multiple calls to _build_wrapper return new instances each time."""
    component = DuckDuckGoSearchComponent()
    codeflash_output = component._build_wrapper()
    codeflash_output = component._build_wrapper()

def test_integration_with_component_class():
    """Test that _build_wrapper can be called from an instance of DuckDuckGoSearchComponent."""
    component = DuckDuckGoSearchComponent()
    codeflash_output = component._build_wrapper()


def test_performance_and_scalability():
    """Test the performance of _build_wrapper when called multiple times."""
    component = DuckDuckGoSearchComponent()
    import time
    start_time = time.time()
    for _ in range(1000):
        component._build_wrapper()
    end_time = time.time()

def test_no_side_effects():
    """Test that _build_wrapper does not modify any state outside its scope."""
    component = DuckDuckGoSearchComponent()
    initial_globals = globals().copy()
    component._build_wrapper()


def test_deterministic_behavior():
    """Test that _build_wrapper always returns the same type of object."""
    component = DuckDuckGoSearchComponent()
    codeflash_output = component._build_wrapper()

def test_documentation():
    """Test that the function's documentation is accurate and helpful."""
    component = DuckDuckGoSearchComponent()
    docstring = component._build_wrapper.__doc__

def test_error_handling(monkeypatch):
    """Test that _build_wrapper handles unexpected errors gracefully."""
    component = DuckDuckGoSearchComponent()
    def mock_init(self):
        raise Exception("Mocked error")
    monkeypatch.setattr('langchain_community.tools.DuckDuckGoSearchRun.__init__', mock_init)
    with pytest.raises(Exception, match="Mocked error"):
        component._build_wrapper()
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

from unittest.mock import patch

# imports
import pytest  # used for our unit tests
# function to test
from langchain_community.tools import DuckDuckGoSearchRun
from langflow.components.tools.duck_duck_go_search_run import \
    DuckDuckGoSearchComponent
from langflow.custom import Component

# unit tests

# Test that _build_wrapper returns an instance of DuckDuckGoSearchRun
def test_returns_duckduckgo_search_run_instance():
    component = DuckDuckGoSearchComponent()
    codeflash_output = component._build_wrapper()

# Test that multiple calls return distinct instances
def test_multiple_calls_return_distinct_instances():
    component = DuckDuckGoSearchComponent()
    codeflash_output = component._build_wrapper()
    codeflash_output = component._build_wrapper()

# Test that component state does not affect instance creation
def test_component_state_does_not_affect_instance_creation():
    component = DuckDuckGoSearchComponent()
    # Modify component state if any (for example, add an attribute)
    component.some_state = "test"
    codeflash_output = component._build_wrapper()

# Simulate constructor failure
def test_constructor_failure(monkeypatch):
    def mock_constructor(self):
        raise Exception("Constructor failed")
    monkeypatch.setattr(DuckDuckGoSearchRun, "__init__", mock_constructor)
    component = DuckDuckGoSearchComponent()
    with pytest.raises(Exception, match="Constructor failed"):
        component._build_wrapper()

# Test component initialization and method call
def test_component_initialization_and_method_call():
    component = DuckDuckGoSearchComponent()
    codeflash_output = component._build_wrapper()

# Test high frequency calls
def test_high_frequency_calls():
    component = DuckDuckGoSearchComponent()
    for _ in range(1000):
        codeflash_output = component._build_wrapper()

# Test no side effects on component state
def test_no_side_effects_on_component_state():
    component = DuckDuckGoSearchComponent()
    initial_state = component.__dict__.copy()
    component._build_wrapper()

# Stress test with a large number of calls
def test_stress_test_large_number_of_calls():
    component = DuckDuckGoSearchComponent()
    for _ in range(1000):
        codeflash_output = component._build_wrapper()

# Verify constructor call