⚡️ Speed up method CohereEmbeddingFunction.name by 7%

[codeflash-ai]

📄 7% (0.07x) speedup for CohereEmbeddingFunction.name in chromadb/utils/embedding_functions/cohere_embedding_function.py

⏱️ Runtime : 124 microseconds → 116 microseconds (best of 423 runs)

📝 Explanation and details

The optimization replaces os.getenv(api_key_env_var) with os.environ.get(api_key_env_var) in the __init__ method. This change improves performance because os.environ.get() directly accesses the environment dictionary, while os.getenv() is a wrapper function that adds overhead with additional function calls and parameter validation.

The speedup is most noticeable in scenarios with frequent instantiation of the CohereEmbeddingFunction class. Based on the test results, the optimization shows consistent 6-8% improvements in repeated calls and large-scale operations (like the 1000-call test case showing 7.53% faster execution). Individual method calls may show variable results due to measurement noise at the nanosecond level, but the cumulative effect becomes significant when the class is instantiated multiple times in production workloads.

This micro-optimization is particularly effective for applications that create many embedding function instances, such as batch processing systems or high-throughput embedding services where initialization overhead can accumulate.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 1049 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	✅ 1 Passed
📊 Tests Coverage	100.0%

🌀 Generated Regression Tests and Runtime

import pytest  # used for our unit tests
from chromadb.utils.embedding_functions.cohere_embedding_function import \
    CohereEmbeddingFunction

# unit tests

# Basic Test Cases
def test_name_returns_correct_string():
    """Test that name() returns the correct string 'cohere'."""
    codeflash_output = CohereEmbeddingFunction.name() # 239ns -> 250ns (4.40% slower)

def test_name_return_type():
    """Test that name() returns a value of type str."""

def test_name_return_value_not_empty():
    """Test that name() does not return an empty string."""
    codeflash_output = CohereEmbeddingFunction.name() # 266ns -> 295ns (9.83% slower)

# Edge Test Cases
def test_name_return_value_case_sensitive():
    """Test that name() is case sensitive and does not return other case variants."""
    codeflash_output = CohereEmbeddingFunction.name() # 222ns -> 254ns (12.6% slower)
    codeflash_output = CohereEmbeddingFunction.name() # 198ns -> 180ns (10.0% faster)
    codeflash_output = CohereEmbeddingFunction.name() # 120ns -> 116ns (3.45% faster)
    codeflash_output = CohereEmbeddingFunction.name() # 109ns -> 113ns (3.54% slower)

def test_name_return_value_no_whitespace():
    """Test that name() does not return the correct string with leading or trailing whitespace."""
    codeflash_output = CohereEmbeddingFunction.name() # 231ns -> 231ns (0.000% faster)
    codeflash_output = CohereEmbeddingFunction.name() # 187ns -> 172ns (8.72% faster)
    codeflash_output = CohereEmbeddingFunction.name() # 120ns -> 113ns (6.19% faster)
    codeflash_output = CohereEmbeddingFunction.name() # 116ns -> 109ns (6.42% faster)

def test_name_return_value_not_none():
    """Test that name() does not return None."""
    codeflash_output = CohereEmbeddingFunction.name() # 230ns -> 235ns (2.13% slower)

def test_name_return_value_not_integer_or_other_type():
    """Test that name() does not return an integer, float, or other type."""

# Large Scale Test Cases
def test_name_return_value_consistency_multiple_calls():
    """Test that name() returns the same value across multiple calls."""
    for _ in range(1000):
        codeflash_output = CohereEmbeddingFunction.name() # 114μs -> 106μs (7.53% faster)

def test_name_return_value_in_list_comprehension():
    """Test that name() returns correct value in a large list comprehension."""
    results = [CohereEmbeddingFunction.name() for _ in range(1000)] # 303ns -> 340ns (10.9% slower)

def test_name_return_value_in_set():
    """Test that a set of many name() calls contains only one unique value."""
    result_set = set(CohereEmbeddingFunction.name() for _ in range(1000)) # 220ns -> 223ns (1.35% slower)

# Negative/Mutation Test Cases (should fail if function is mutated)
def test_name_return_value_mutation():
    """Test that the function fails if the return value is mutated."""
    # These assertions would fail if the function returned anything other than 'cohere'
    codeflash_output = CohereEmbeddingFunction.name() # 222ns -> 253ns (12.3% slower)

# Defensive Test: Ensure staticmethod property
def test_name_is_staticmethod():
    """Test that name is a static method."""
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.
#------------------------------------------------
import pytest  # used for our unit tests
from chromadb.utils.embedding_functions.cohere_embedding_function import \
    CohereEmbeddingFunction

# unit tests

def test_basic_name_return():
    """Basic: Test that the name function returns the expected string."""
    codeflash_output = CohereEmbeddingFunction.name() # 333ns -> 341ns (2.35% slower)

def test_name_return_type():
    """Basic: Test that the name function returns a string type."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 292ns -> 315ns (7.30% slower)

def test_name_return_value_case_sensitive():
    """Edge: Test that the name function is case sensitive and returns exactly 'cohere'."""
    # The returned value should be exactly 'cohere', not 'Cohere', 'COHERE', etc.
    codeflash_output = CohereEmbeddingFunction.name() # 245ns -> 275ns (10.9% slower)
    codeflash_output = CohereEmbeddingFunction.name() # 190ns -> 187ns (1.60% faster)
    codeflash_output = CohereEmbeddingFunction.name() # 121ns -> 119ns (1.68% faster)
    codeflash_output = CohereEmbeddingFunction.name() # 122ns -> 113ns (7.96% faster)

def test_name_return_value_nonempty():
    """Edge: Test that the name function does not return an empty string."""
    codeflash_output = CohereEmbeddingFunction.name() # 212ns -> 236ns (10.2% slower)

def test_name_return_value_no_whitespace():
    """Edge: Test that the name function does not return a string with leading/trailing whitespace."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 226ns -> 240ns (5.83% slower)

def test_name_return_value_no_special_characters():
    """Edge: Test that the name function does not return a string with special characters."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 230ns -> 245ns (6.12% slower)
    # Check for absence of digits and special characters
    for ch in result:
        pass

def test_name_return_value_length():
    """Edge: Test that the name function returns a string of length 6."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 219ns -> 218ns (0.459% faster)

def test_name_return_value_multiple_calls_consistency():
    """Edge: Test that multiple calls to name() return the same value."""
    for _ in range(10):
        codeflash_output = CohereEmbeddingFunction.name() # 1.37μs -> 1.34μs (2.23% faster)

def test_name_return_value_large_scale_calls():
    """Large Scale: Test that calling name() many times is consistent and performant."""
    # 1000 calls, should always return the same value
    results = [CohereEmbeddingFunction.name() for _ in range(1000)] # 216ns -> 248ns (12.9% slower)

def test_name_return_value_in_set_of_expected_names():
    """Edge: Test that the returned name is in the expected set (should only be 'cohere')."""
    expected_names = {"cohere"}
    codeflash_output = CohereEmbeddingFunction.name() # 213ns -> 214ns (0.467% slower)

def test_name_return_value_not_none():
    """Edge: Test that the name function does not return None."""
    codeflash_output = CohereEmbeddingFunction.name() # 220ns -> 243ns (9.47% slower)

def test_name_return_value_hashable():
    """Edge: Test that the returned value is hashable (as a string)."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 242ns -> 230ns (5.22% faster)
    try:
        hash(result)
    except Exception:
        pytest.fail("Returned value is not hashable")

def test_name_return_value_immutable():
    """Edge: Test that the returned value is immutable (strings are immutable in Python)."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 232ns -> 246ns (5.69% slower)
    # Attempting to mutate should raise a TypeError
    with pytest.raises(TypeError):
        result[0] = "C"

def test_name_return_value_repr_and_str():
    """Edge: Test that str() and repr() of the return value are the same and correct."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 237ns -> 261ns (9.20% slower)

def test_name_return_value_no_formatting():
    """Edge: Test that the returned string does not contain formatting characters."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 229ns -> 213ns (7.51% faster)

def test_name_return_value_is_lowercase():
    """Edge: Test that the returned string is all lowercase."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 239ns -> 273ns (12.5% slower)

def test_name_return_value_no_unicode():
    """Edge: Test that the returned string contains only ASCII characters."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 223ns -> 275ns (18.9% slower)

def test_name_return_value_no_numbers():
    """Edge: Test that the returned string contains no digits."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 222ns -> 251ns (11.6% slower)

def test_name_return_value_no_empty_space():
    """Edge: Test that the returned string contains no spaces."""
    codeflash_output = CohereEmbeddingFunction.name(); result = codeflash_output # 226ns -> 226ns (0.000% faster)

def test_name_return_value_large_scale_unique():
    """Large Scale: Test that many calls to name() always return the same value and no duplicates."""
    results = [CohereEmbeddingFunction.name() for _ in range(1000)] # 206ns -> 270ns (23.7% slower)
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.
#------------------------------------------------
from chromadb.utils.embedding_functions.cohere_embedding_function import CohereEmbeddingFunction

def test_CohereEmbeddingFunction_name():
    CohereEmbeddingFunction.name()

🔎 Concolic Coverage Tests and Runtime

Test File::Test Function	Original ⏱️	Optimized ⏱️	Speedup
codeflash_concolic_pyyz8niz/tmp84he7fgv/test_concolic_coverage.py::test_CohereEmbeddingFunction_name	274ns	285ns	-3.86%⚠️

To edit these changes git checkout codeflash/optimize-CohereEmbeddingFunction.name-mh2jp2tg and push.