⚡️ Speed up function get_space by 8%

[codeflash-ai]

📄 8% (0.08x) speedup for get_space in gradio/utils.py

⏱️ Runtime : 297 microseconds → 274 microseconds (best of 88 runs)

📝 Explanation and details

The optimization replaces os.getenv() with os.environ.get() for both environment variable lookups, delivering an 8% speedup (297μs → 274μs).

Key optimization:

• os.environ.get() directly accesses the environment dictionary, while os.getenv() is a wrapper function that adds overhead by calling os.environ.get() internally with additional parameter handling.

Performance impact:
The line profiler shows the most significant improvement on the first line (if os.environ.get("SYSTEM") == "spaces"), where time per hit dropped from 3526.3ns to 3185.1ns - a ~10% improvement on the hottest code path. This line executes 299 times in the profiling run, making the optimization particularly effective.

Context relevance:
Based on the function references, get_space() is called multiple times during Gradio app initialization in blocks.py - specifically in the __init__ method (self.space_id = utils.get_space()) and launch() method (self.api_open = utils.get_space() is None and self.pwa = utils.get_space() is not None). Since Gradio app initialization is a common operation, this micro-optimization provides meaningful cumulative benefits.

Test case performance:
The annotated tests show consistent 12-27% speedups across all scenarios, with the optimization being particularly effective for:

• Cases with many environment variables (19-27% faster)
• Basic lookup scenarios (12-21% faster)
• Edge cases with missing/invalid values (6-25% faster)

The optimization maintains identical behavior while reducing function call overhead in this frequently-executed utility function.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 44 Passed
⏪ Replay Tests	✅ 255 Passed
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	100.0%

🌀 Generated Regression Tests and Runtime

import os

# imports
import pytest  # used for our unit tests
from gradio.utils import get_space

# unit tests

@pytest.mark.parametrize(
    "env,expected",
    [
        # Basic: SYSTEM=spaces, SPACE_ID set
        ({"SYSTEM": "spaces", "SPACE_ID": "abc-def"}, "abc-def"),
        # Basic: SYSTEM=spaces, SPACE_ID empty string
        ({"SYSTEM": "spaces", "SPACE_ID": ""}, ""),
        # Basic: SYSTEM=spaces, SPACE_ID not set
        ({"SYSTEM": "spaces"}, None),
        # Basic: SYSTEM not set, SPACE_ID set
        ({"SPACE_ID": "shouldnotreturn"}, None),
        # Basic: SYSTEM not set, SPACE_ID not set
        ({}, None),
        # Basic: SYSTEM set to something else, SPACE_ID set
        ({"SYSTEM": "local", "SPACE_ID": "shouldnotreturn"}, None),
        # Edge: SYSTEM set to "SPACES" (case sensitivity)
        ({"SYSTEM": "SPACES", "SPACE_ID": "abc"}, None),
        # Edge: SYSTEM set to "spaces ", SPACE_ID set (trailing space)
        ({"SYSTEM": "spaces ", "SPACE_ID": "abc"}, None),
        # Edge: SYSTEM set to "spaces", SPACE_ID set to None
        ({"SYSTEM": "spaces", "SPACE_ID": None}, None),
        # Edge: SYSTEM set to "spaces", SPACE_ID set to whitespace
        ({"SYSTEM": "spaces", "SPACE_ID": "   "}, "   "),
        # Edge: SYSTEM set to "spaces", SPACE_ID set to "0"
        ({"SYSTEM": "spaces", "SPACE_ID": "0"}, "0"),
        # Edge: SYSTEM set to "spaces", SPACE_ID set to special chars
        ({"SYSTEM": "spaces", "SPACE_ID": "!@#$%^&*()"}, "!@#$%^&*()"),
        # Edge: SYSTEM set to "spaces", SPACE_ID set to unicode
        ({"SYSTEM": "spaces", "SPACE_ID": "空间-123"}, "空间-123"),
    ]
)
def test_get_space_basic_and_edge(monkeypatch, env, expected):
    """
    Test get_space with a variety of basic and edge environment variable settings.
    """
    # Clear environment variables first
    monkeypatch.delenv("SYSTEM", raising=False)
    monkeypatch.delenv("SPACE_ID", raising=False)
    # Set environment variables as needed
    for k, v in env.items():
        if v is None:
            monkeypatch.delenv(k, raising=False)
        else:
            monkeypatch.setenv(k, v)
    # Assert expected output
    codeflash_output = get_space() # 27.2μs -> 22.6μs (20.1% faster)

def test_get_space_large_scale(monkeypatch):
    """
    Test get_space with a large number of unrelated environment variables to ensure
    it is not affected by unrelated data and performs efficiently.
    """
    # Set SYSTEM and SPACE_ID correctly
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "large-scale-space")
    # Add 1000 unrelated environment variables
    for i in range(1000):
        monkeypatch.setenv(f"UNRELATED_VAR_{i}", str(i))
    # Should still return correct SPACE_ID
    codeflash_output = get_space() # 2.96μs -> 2.48μs (19.4% faster)

def test_get_space_large_scale_absent(monkeypatch):
    """
    Test get_space with a large number of unrelated environment variables but SYSTEM/SPACE_ID missing.
    """
    # Ensure SYSTEM and SPACE_ID are not set
    monkeypatch.delenv("SYSTEM", raising=False)
    monkeypatch.delenv("SPACE_ID", raising=False)
    # Add 1000 unrelated environment variables
    for i in range(1000):
        monkeypatch.setenv(f"UNRELATED_VAR_{i}", str(i))
    # Should return None
    codeflash_output = get_space() # 1.89μs -> 1.56μs (20.6% faster)

def test_get_space_env_var_mutation(monkeypatch):
    """
    Test that changing SYSTEM from 'spaces' to something else changes the result.
    """
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "abc")
    codeflash_output = get_space() # 2.21μs -> 1.93μs (14.0% faster)
    # Change SYSTEM
    monkeypatch.setenv("SYSTEM", "other")
    codeflash_output = get_space() # 848ns -> 753ns (12.6% faster)

def test_get_space_env_var_removal(monkeypatch):
    """
    Test that removing SYSTEM or SPACE_ID changes the result as expected.
    """
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "xyz")
    codeflash_output = get_space() # 2.16μs -> 1.81μs (19.5% faster)
    # Remove SPACE_ID
    monkeypatch.delenv("SPACE_ID", raising=False)
    codeflash_output = get_space() # 1.43μs -> 1.41μs (1.28% faster)
    # Remove SYSTEM
    monkeypatch.delenv("SYSTEM", raising=False)
    codeflash_output = get_space() # 880ns -> 825ns (6.67% faster)

def test_get_space_space_id_is_zero(monkeypatch):
    """
    Test that SPACE_ID='0' is returned as a valid value.
    """
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "0")
    codeflash_output = get_space() # 2.07μs -> 1.84μs (12.7% faster)

def test_get_space_space_id_is_empty_string(monkeypatch):
    """
    Test that SPACE_ID='' (empty string) is returned as a valid value.
    """
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "")
    codeflash_output = get_space() # 2.14μs -> 1.89μs (13.4% faster)

def test_get_space_system_spaces_case_sensitive(monkeypatch):
    """
    Test that SYSTEM='Spaces' (capital S) does not match 'spaces'.
    """
    monkeypatch.setenv("SYSTEM", "Spaces")
    monkeypatch.setenv("SPACE_ID", "abc")
    codeflash_output = get_space() # 1.63μs -> 1.35μs (21.0% faster)

def test_get_space_space_id_not_set(monkeypatch):
    """
    Test that if SYSTEM='spaces' but SPACE_ID is not set, returns None.
    """
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.delenv("SPACE_ID", raising=False)
    codeflash_output = get_space() # 2.37μs -> 2.08μs (14.2% faster)

def test_get_space_space_id_is_none(monkeypatch):
    """
    Test that if SPACE_ID is explicitly set to None, returns None.
    """
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.delenv("SPACE_ID", raising=False)
    codeflash_output = get_space() # 2.39μs -> 2.00μs (19.2% faster)
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

import os

# imports
import pytest  # used for our unit tests
from gradio.utils import get_space

# unit tests

# --- Basic Test Cases ---

def test_get_space_returns_space_id_when_system_is_spaces_and_space_id_set(monkeypatch):
    """Should return SPACE_ID when SYSTEM is 'spaces' and SPACE_ID is set."""
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "abc123")
    codeflash_output = get_space() # 2.28μs -> 1.87μs (21.7% faster)

def test_get_space_returns_none_when_system_not_spaces(monkeypatch):
    """Should return None when SYSTEM is not 'spaces'."""
    monkeypatch.setenv("SYSTEM", "local")
    monkeypatch.setenv("SPACE_ID", "abc123")
    codeflash_output = get_space() # 1.56μs -> 1.31μs (18.6% faster)

def test_get_space_returns_none_when_system_not_set(monkeypatch):
    """Should return None when SYSTEM is not set."""
    monkeypatch.delenv("SYSTEM", raising=False)
    monkeypatch.setenv("SPACE_ID", "abc123")
    codeflash_output = get_space() # 1.71μs -> 1.37μs (24.9% faster)

def test_get_space_returns_none_when_space_id_not_set(monkeypatch):
    """Should return None when SPACE_ID is not set, even if SYSTEM is 'spaces'."""
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.delenv("SPACE_ID", raising=False)
    codeflash_output = get_space() # 2.38μs -> 1.99μs (19.3% faster)

# --- Edge Test Cases ---

def test_get_space_returns_none_when_space_id_empty(monkeypatch):
    """Should return None when SPACE_ID is set to empty string."""
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "")
    codeflash_output = get_space() # 2.08μs -> 1.87μs (11.2% faster)

def test_get_space_returns_none_when_space_id_is_none(monkeypatch):
    """Should return None when SPACE_ID is set to None using os.environ."""
    monkeypatch.setenv("SYSTEM", "spaces")
    # os.environ cannot set None, so SPACE_ID will not exist
    monkeypatch.delenv("SPACE_ID", raising=False)
    codeflash_output = get_space() # 2.30μs -> 1.97μs (16.8% faster)

def test_get_space_returns_none_when_system_is_empty(monkeypatch):
    """Should return None when SYSTEM is set to empty string."""
    monkeypatch.setenv("SYSTEM", "")
    monkeypatch.setenv("SPACE_ID", "abc123")
    codeflash_output = get_space() # 1.54μs -> 1.21μs (27.7% faster)

def test_get_space_returns_none_when_both_env_vars_missing(monkeypatch):
    """Should return None when both SYSTEM and SPACE_ID are missing."""
    monkeypatch.delenv("SYSTEM", raising=False)
    monkeypatch.delenv("SPACE_ID", raising=False)
    codeflash_output = get_space() # 1.77μs -> 1.42μs (24.4% faster)

def test_get_space_returns_space_id_with_special_characters(monkeypatch):
    """Should return SPACE_ID with special characters when SYSTEM is 'spaces'."""
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "sp@ce!_id#123")
    codeflash_output = get_space() # 2.25μs -> 1.89μs (18.8% faster)

def test_get_space_returns_space_id_with_long_string(monkeypatch):
    """Should return SPACE_ID even if it's a long string."""
    long_id = "a" * 1000
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", long_id)
    codeflash_output = get_space() # 2.58μs -> 2.15μs (20.0% faster)

# --- Large Scale Test Cases ---

def test_get_space_performance_with_many_env_vars(monkeypatch):
    """Should still return correct SPACE_ID when many unrelated env vars are set."""
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "large_scale_id")
    # Set 999 unrelated environment variables
    for i in range(999):
        monkeypatch.setenv(f"DUMMY_VAR_{i}", f"value_{i}")
    codeflash_output = get_space() # 3.03μs -> 2.61μs (16.1% faster)

def test_get_space_returns_none_with_many_env_vars_and_wrong_system(monkeypatch):
    """Should return None when SYSTEM is not 'spaces', even with many env vars."""
    monkeypatch.setenv("SYSTEM", "not_spaces")
    monkeypatch.setenv("SPACE_ID", "large_scale_id")
    for i in range(999):
        monkeypatch.setenv(f"DUMMY_VAR_{i}", f"value_{i}")
    codeflash_output = get_space() # 2.25μs -> 1.76μs (27.3% faster)

def test_get_space_returns_none_with_many_env_vars_and_no_space_id(monkeypatch):
    """Should return None when SPACE_ID is missing, even with many env vars."""
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.delenv("SPACE_ID", raising=False)
    for i in range(999):
        monkeypatch.setenv(f"DUMMY_VAR_{i}", f"value_{i}")
    codeflash_output = get_space() # 3.12μs -> 2.66μs (17.0% faster)

# --- Determinism Test ---

def test_get_space_deterministic(monkeypatch):
    """Should always return the same value for the same environment setup."""
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "deterministic_id")
    codeflash_output = get_space(); result1 = codeflash_output # 2.28μs -> 1.94μs (17.7% faster)
    codeflash_output = get_space(); result2 = codeflash_output # 1.11μs -> 1.04μs (6.51% faster)

# --- Case Sensitivity Test ---

def test_get_space_case_sensitivity(monkeypatch):
    """Should be case sensitive for SYSTEM variable value."""
    monkeypatch.setenv("SYSTEM", "Spaces")  # capital S
    monkeypatch.setenv("SPACE_ID", "abc123")
    codeflash_output = get_space() # 1.60μs -> 1.32μs (21.1% faster)

# --- Unusual Characters in Env Vars ---

def test_get_space_with_unicode_space_id(monkeypatch):
    """Should handle SPACE_ID with unicode characters."""
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "空间123")
    codeflash_output = get_space() # 2.92μs -> 2.58μs (13.2% faster)

# --- SYSTEM variable with whitespace ---

def test_get_space_with_system_whitespace(monkeypatch):
    """Should return None if SYSTEM has leading/trailing whitespace."""
    monkeypatch.setenv("SYSTEM", " spaces ")
    monkeypatch.setenv("SPACE_ID", "id_with_space")
    codeflash_output = get_space() # 1.58μs -> 1.29μs (21.9% faster)

# --- SPACE_ID variable with whitespace ---

def test_get_space_with_space_id_whitespace(monkeypatch):
    """Should return SPACE_ID even if it has leading/trailing whitespace."""
    monkeypatch.setenv("SYSTEM", "spaces")
    monkeypatch.setenv("SPACE_ID", "  id_with_space  ")
    codeflash_output = get_space() # 2.20μs -> 1.86μs (18.2% faster)
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.

⏪ Replay Tests and Runtime

Test File::Test Function	Original ⏱️	Optimized ⏱️	Speedup
test_pytest_testtest_components_py_testcomponentstest_audio_py_testcomponentstest_file_py_testcomponentst__replay_test_0.py::test_gradio_utils_get_space	206μs	197μs	4.62%✅

To edit these changes git checkout codeflash/optimize-get_space-mhwzrm6f and push.