⚡️ Speed up function _get_google_cloud_logs_url by 21%

[codeflash-ai]

📄 21% (0.21x) speedup for _get_google_cloud_logs_url in sentry_sdk/integrations/gcp.py

⏱️ Runtime : 3.03 milliseconds → 2.49 milliseconds (best of 97 runs)

📝 Explanation and details

The optimization achieves a 21% speedup through two key changes:

1. Eliminated redundant environment variable lookups: The original code called environ.get() three times inside the .format() method, which the profiler shows were expensive operations (19.2%, 14.6%, and 13.5% of total time). The optimized version moves these calls to the beginning, storing values in local variables that are accessed multiple times during f-string formatting.

2. Replaced .format() with f-strings: F-string interpolation is generally faster than .format() method calls in Python, especially when variables are readily available as local references rather than being passed as keyword arguments.

The optimized version also moves the format string definition and datetime calculations earlier, creating a more linear execution flow that's cache-friendly. While the profiler shows slightly higher per-hit times for individual operations in the optimized version, the overall function execution is faster due to reduced method call overhead.

Test case performance: The optimization shows consistent 17-33% improvements across all test scenarios, with particularly strong gains (25-33%) for edge cases with missing environment variables and large-scale tests with many function calls. This suggests the optimization is most beneficial when the function is called repeatedly or when environment variable access patterns vary.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 430 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	100.0%

🌀 Generated Regression Tests and Runtime

import os
# function to test
from datetime import datetime, timedelta
from os import environ

# imports
import pytest  # used for our unit tests
from sentry_sdk.integrations.gcp import _get_google_cloud_logs_url

# ---- Basic Test Cases ----

def test_basic_url_generation(monkeypatch):
    """
    Test that the function generates the correct URL with typical environment variables and a normal datetime.
    """
    # Set up environment variables
    monkeypatch.setenv("GCP_PROJECT", "my-project")
    monkeypatch.setenv("FUNCTION_NAME", "my-func")
    monkeypatch.setenv("FUNCTION_REGION", "us-central1")

    # Use a fixed datetime
    final_time = datetime(2024, 6, 1, 12, 0, 0)
    expected_start = "2024-06-01T11:00:00Z"
    expected_end = "2024-06-01T12:00:00Z"

    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 10.9μs -> 8.65μs (25.5% faster)

def test_different_time(monkeypatch):
    """
    Test that the function generates correct timestamps for a different datetime.
    """
    monkeypatch.setenv("GCP_PROJECT", "other-project")
    monkeypatch.setenv("FUNCTION_NAME", "other-func")
    monkeypatch.setenv("FUNCTION_REGION", "europe-west1")

    final_time = datetime(2023, 1, 1, 0, 0, 0)
    expected_start = "2022-12-31T23:00:00Z"
    expected_end = "2023-01-01T00:00:00Z"

    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 10.6μs -> 8.99μs (17.5% faster)

def test_environment_variables_with_special_characters(monkeypatch):
    """
    Test that special characters in environment variables are handled correctly.
    """
    monkeypatch.setenv("GCP_PROJECT", "proj-!@#$%^&*()")
    monkeypatch.setenv("FUNCTION_NAME", "func_测试")
    monkeypatch.setenv("FUNCTION_REGION", "asia-east1")

    final_time = datetime(2024, 6, 1, 23, 59, 59)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 12.7μs -> 10.6μs (20.5% faster)

# ---- Edge Test Cases ----

def test_missing_gcp_project(monkeypatch):
    """
    Test behavior when GCP_PROJECT is missing from environment.
    """
    # Only set FUNCTION_NAME and FUNCTION_REGION
    monkeypatch.delenv("GCP_PROJECT", raising=False)
    monkeypatch.setenv("FUNCTION_NAME", "func")
    monkeypatch.setenv("FUNCTION_REGION", "region1")

    final_time = datetime(2024, 6, 1, 12, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 10.9μs -> 9.32μs (17.3% faster)

def test_missing_function_name(monkeypatch):
    """
    Test behavior when FUNCTION_NAME is missing from environment.
    """
    monkeypatch.setenv("GCP_PROJECT", "project")
    monkeypatch.delenv("FUNCTION_NAME", raising=False)
    monkeypatch.setenv("FUNCTION_REGION", "region1")

    final_time = datetime(2024, 6, 1, 12, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 11.8μs -> 9.58μs (22.6% faster)

def test_missing_function_region(monkeypatch):
    """
    Test behavior when FUNCTION_REGION is missing from environment.
    """
    monkeypatch.setenv("GCP_PROJECT", "project")
    monkeypatch.setenv("FUNCTION_NAME", "func")
    monkeypatch.delenv("FUNCTION_REGION", raising=False)

    final_time = datetime(2024, 6, 1, 12, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 11.8μs -> 9.41μs (25.4% faster)

def test_all_env_vars_missing(monkeypatch):
    """
    Test behavior when all environment variables are missing.
    """
    monkeypatch.delenv("GCP_PROJECT", raising=False)
    monkeypatch.delenv("FUNCTION_NAME", raising=False)
    monkeypatch.delenv("FUNCTION_REGION", raising=False)

    final_time = datetime(2024, 6, 1, 12, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 11.5μs -> 9.51μs (20.8% faster)

def test_final_time_at_epoch(monkeypatch):
    """
    Test with final_time at the Unix epoch.
    """
    monkeypatch.setenv("GCP_PROJECT", "project")
    monkeypatch.setenv("FUNCTION_NAME", "func")
    monkeypatch.setenv("FUNCTION_REGION", "region")

    final_time = datetime(1970, 1, 1, 0, 0, 0)
    expected_start = "1969-12-31T23:00:00Z"
    expected_end = "1970-01-01T00:00:00Z"

    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 11.6μs -> 9.57μs (21.2% faster)

def test_final_time_before_epoch(monkeypatch):
    """
    Test with final_time before Unix epoch (should still format correctly).
    """
    monkeypatch.setenv("GCP_PROJECT", "project")
    monkeypatch.setenv("FUNCTION_NAME", "func")
    monkeypatch.setenv("FUNCTION_REGION", "region")

    final_time = datetime(1969, 12, 31, 0, 0, 0)
    expected_start = "1969-12-30T23:00:00Z"
    expected_end = "1969-12-31T00:00:00Z"

    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 11.2μs -> 9.29μs (20.0% faster)

def test_final_time_far_future(monkeypatch):
    """
    Test with final_time far in the future.
    """
    monkeypatch.setenv("GCP_PROJECT", "future-project")
    monkeypatch.setenv("FUNCTION_NAME", "future-func")
    monkeypatch.setenv("FUNCTION_REGION", "future-region")

    final_time = datetime(2999, 12, 31, 23, 59, 59)
    expected_end = "2999-12-31T23:59:59Z"
    expected_start = "2999-12-31T22:59:59Z"

    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 11.6μs -> 9.28μs (25.0% faster)

def test_env_vars_empty_strings(monkeypatch):
    """
    Test with environment variables set to empty strings.
    """
    monkeypatch.setenv("GCP_PROJECT", "")
    monkeypatch.setenv("FUNCTION_NAME", "")
    monkeypatch.setenv("FUNCTION_REGION", "")

    final_time = datetime(2024, 6, 1, 12, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 11.0μs -> 9.02μs (22.2% faster)

def test_final_time_with_microseconds(monkeypatch):
    """
    Test that microseconds are ignored in the formatted output.
    """
    monkeypatch.setenv("GCP_PROJECT", "project")
    monkeypatch.setenv("FUNCTION_NAME", "func")
    monkeypatch.setenv("FUNCTION_REGION", "region")

    final_time = datetime(2024, 6, 1, 12, 0, 0, 999999)
    expected_end = "2024-06-01T12:00:00Z"  # microseconds should be truncated

    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 11.4μs -> 9.14μs (24.3% faster)

# ---- Large Scale Test Cases ----

@pytest.mark.parametrize("i", range(10))  # Keep under 1000 for performance
def test_large_scale_unique_env_and_time(monkeypatch, i):
    """
    Test function with multiple unique combinations of environment variables and final_time.
    """
    # Use unique values for each iteration
    project = f"project-{i}"
    func = f"func-{i}"
    region = f"region-{i}"
    monkeypatch.setenv("GCP_PROJECT", project)
    monkeypatch.setenv("FUNCTION_NAME", func)
    monkeypatch.setenv("FUNCTION_REGION", region)

    # Use a unique datetime for each iteration
    final_time = datetime(2024, 1, 1, 0, 0, 0) + timedelta(hours=i)
    expected_start = (final_time - timedelta(hours=1)).strftime("%Y-%m-%dT%H:%M:%SZ")
    expected_end = final_time.strftime("%Y-%m-%dT%H:%M:%SZ")

    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 78.5μs -> 59.5μs (32.1% faster)

def test_large_scale_env_var_length(monkeypatch):
    """
    Test function's handling of very long environment variable values.
    """
    long_project = "p" * 500
    long_func = "f" * 500
    long_region = "r" * 500
    monkeypatch.setenv("GCP_PROJECT", long_project)
    monkeypatch.setenv("FUNCTION_NAME", long_func)
    monkeypatch.setenv("FUNCTION_REGION", long_region)

    final_time = datetime(2024, 6, 1, 12, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 11.8μs -> 9.39μs (25.8% faster)

def test_large_scale_many_calls(monkeypatch):
    """
    Test calling the function many times in succession to check for statelessness and performance.
    """
    monkeypatch.setenv("GCP_PROJECT", "stateless-project")
    monkeypatch.setenv("FUNCTION_NAME", "stateless-func")
    monkeypatch.setenv("FUNCTION_REGION", "stateless-region")

    base_time = datetime(2024, 6, 1, 0, 0, 0)
    for i in range(100):  # Keep under 1000 for performance
        final_time = base_time + timedelta(minutes=i)
        codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 497μs -> 407μs (22.3% faster)
        expected_end = (base_time + timedelta(minutes=i)).strftime("%Y-%m-%dT%H:%M:%SZ")

def test_large_scale_time_zone_independence(monkeypatch):
    """
    Test that the function ignores any tzinfo and always formats as UTC 'Z'.
    """
    import pytz
    monkeypatch.setenv("GCP_PROJECT", "tz-project")
    monkeypatch.setenv("FUNCTION_NAME", "tz-func")
    monkeypatch.setenv("FUNCTION_REGION", "tz-region")

    # Use a datetime with a non-UTC tzinfo
    tz = pytz.timezone('Asia/Tokyo')
    naive_time = datetime(2024, 6, 1, 12, 0, 0)
    aware_time = tz.localize(naive_time)
    # The function should ignore tzinfo and just use the naive time as-is
    codeflash_output = _get_google_cloud_logs_url(aware_time); url = codeflash_output

# ---- Determinism Test ----

def test_determinism(monkeypatch):
    """
    Test that the function returns the same result for the same inputs.
    """
    monkeypatch.setenv("GCP_PROJECT", "det-project")
    monkeypatch.setenv("FUNCTION_NAME", "det-func")
    monkeypatch.setenv("FUNCTION_REGION", "det-region")

    final_time = datetime(2024, 6, 1, 12, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url1 = codeflash_output # 16.7μs -> 13.9μs (19.9% faster)
    codeflash_output = _get_google_cloud_logs_url(final_time); url2 = codeflash_output # 6.52μs -> 5.01μs (30.1% faster)

# ---- Invalid Input Test ----



#------------------------------------------------
import os
# function to test
from datetime import datetime, timedelta
from os import environ

# imports
import pytest  # used for our unit tests
from sentry_sdk.integrations.gcp import _get_google_cloud_logs_url

# 1. Basic Test Cases

def test_basic_url_generation():
    """
    Test that the URL is generated correctly for a typical datetime input.
    """
    final_time = datetime(2024, 6, 1, 12, 30, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 17.9μs -> 15.0μs (19.3% faster)

def test_url_with_different_env(monkeypatch):
    """
    Test that the URL reflects different environment variable values.
    """
    monkeypatch.setenv("GCP_PROJECT", "myproj")
    monkeypatch.setenv("FUNCTION_NAME", "myfunc")
    monkeypatch.setenv("FUNCTION_REGION", "europe-west1")
    final_time = datetime(2023, 12, 25, 18, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 13.1μs -> 10.8μs (21.9% faster)

def test_url_formatting_seconds_and_minutes():
    """
    Test that the URL correctly formats times with seconds and minutes.
    """
    final_time = datetime(2024, 1, 2, 3, 4, 5)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 13.3μs -> 10.7μs (24.3% faster)

# 2. Edge Test Cases

def test_url_at_midnight():
    """
    Test URL generation when the final_time is at midnight.
    """
    final_time = datetime(2024, 6, 1, 0, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 12.8μs -> 10.7μs (20.1% faster)

def test_url_on_leap_day():
    """
    Test URL generation for a leap day.
    """
    final_time = datetime(2024, 2, 29, 23, 59, 59)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 12.1μs -> 10.6μs (14.7% faster)

def test_url_with_missing_env(monkeypatch):
    """
    Test behavior when one or more required environment variables are missing.
    Should insert 'None' in the URL for missing variables.
    """
    monkeypatch.delenv("GCP_PROJECT", raising=False)
    monkeypatch.delenv("FUNCTION_NAME", raising=False)
    monkeypatch.delenv("FUNCTION_REGION", raising=False)
    final_time = datetime(2024, 6, 1, 12, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 11.9μs -> 9.46μs (26.2% faster)

def test_url_with_non_ascii_env(monkeypatch):
    """
    Test that non-ASCII environment variable values are handled (should be inserted as-is).
    """
    monkeypatch.setenv("GCP_PROJECT", "prøject")
    monkeypatch.setenv("FUNCTION_NAME", "fünctïon")
    monkeypatch.setenv("FUNCTION_REGION", "regiøn")
    final_time = datetime(2024, 6, 1, 12, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 13.1μs -> 10.8μs (21.1% faster)

def test_url_with_very_old_time():
    """
    Test that the function works with very old datetime values.
    """
    final_time = datetime(1970, 1, 1, 1, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 12.0μs -> 10.3μs (16.6% faster)

def test_url_with_microseconds():
    """
    Test that microseconds are ignored in the output (should not appear).
    """
    final_time = datetime(2024, 6, 1, 12, 0, 0, 999999)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 12.2μs -> 9.79μs (25.1% faster)


def test_url_with_non_integer_hour():
    """
    Test that the function handles times where the hour is not an integer (should always be).
    """
    # Not possible with datetime, but test with minute/second values
    final_time = datetime(2024, 6, 1, 12, 45, 30)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 18.1μs -> 14.9μs (21.1% faster)

# 3. Large Scale Test Cases

@pytest.mark.parametrize("i", range(100))
def test_large_scale_many_urls(i):
    """
    Test that the function can generate many URLs in quick succession with different datetimes.
    """
    base_time = datetime(2024, 6, 1, 0, 0, 0)
    final_time = base_time + timedelta(minutes=i*5)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 1.08ms -> 886μs (22.2% faster)
    # Check that each url is unique and has correct timestamps
    expected_end = (base_time + timedelta(minutes=i*5)).strftime("%Y-%m-%dT%H:%M:%SZ")
    expected_start = (base_time + timedelta(minutes=i*5) - timedelta(hours=1)).strftime("%Y-%m-%dT%H:%M:%SZ")

def test_large_scale_long_function_names(monkeypatch):
    """
    Test with very long function names and project names to ensure no truncation or errors.
    """
    long_name = "f" * 250
    long_project = "p" * 250
    long_region = "r" * 250
    monkeypatch.setenv("GCP_PROJECT", long_project)
    monkeypatch.setenv("FUNCTION_NAME", long_name)
    monkeypatch.setenv("FUNCTION_REGION", long_region)
    final_time = datetime(2024, 6, 1, 12, 0, 0)
    codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 12.0μs -> 8.96μs (33.6% faster)

def test_large_scale_different_times():
    """
    Test with a variety of times in a single test to check for collisions or memory leaks.
    """
    times = [datetime(2024, 6, 1, h, m, s) for h in range(0, 24, 2) for m in range(0, 60, 10) for s in (0, 30)]
    seen_urls = set()
    for t in times:
        codeflash_output = _get_google_cloud_logs_url(t); url = codeflash_output # 792μs -> 668μs (18.6% faster)
        seen_urls.add(url)

def test_large_scale_env_var_performance(monkeypatch):
    """
    Test repeatedly changing environment variables and generating URLs to ensure no caching or cross-talk.
    """
    for i in range(50):
        proj = f"proj{i}"
        func = f"func{i}"
        reg = f"region{i}"
        monkeypatch.setenv("GCP_PROJECT", proj)
        monkeypatch.setenv("FUNCTION_NAME", func)
        monkeypatch.setenv("FUNCTION_REGION", reg)
        final_time = datetime(2024, 6, 1, 12, 0, 0) + timedelta(minutes=i)
        codeflash_output = _get_google_cloud_logs_url(final_time); url = codeflash_output # 256μs -> 210μs (21.6% faster)
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

To edit these changes git checkout codeflash/optimize-_get_google_cloud_logs_url-mg91xs3y and push.