⚡️ Speed up method AwsEnvironment.get_session by 6%

[codeflash-ai]

📄 6% (0.06x) speedup for AwsEnvironment.get_session in wandb/sdk/launch/environment/aws_environment.py

⏱️ Runtime : 41.5 seconds → 39.1 seconds (best of 6 runs)

📝 Explanation and details

Optimizations Applied:

• Use of asyncio.to_thread(): Replaced the custom event_loop_thread_exec() wrapper with native asyncio.to_thread() for running the boto3.Session constructor in a thread. This results in slightly better performance and clarity, avoids redundant lambda wrapping and future management, and is recommended for Python 3.9+ when calling blocking functions from async code.
• Reduced an unnecessary function call layer: Directly used asyncio.to_thread() instead of wrapping the function with another async function call, slightly improving memory efficiency and reducing context switches by removing the wrapper overhead.
• Preserved all error handling, signatures, behavior, and logging.

---

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	✅ 745 Passed
⏪ Replay Tests	🔘 None Found
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	66.7%

🌀 Generated Regression Tests and Runtime

import asyncio  # used to run async functions
# Function to test (copied exactly as provided)
import logging
from typing import Any, cast

import pytest  # used for our unit tests
from wandb.sdk.launch.environment.aws_environment import AwsEnvironment


# Minimal stubs for required imports
class DummyLaunchError(Exception):
    pass

class DummyAbstractEnvironment:
    def __init__(self):
        pass

def dummy_get_module(name, required=None):
    # Return dummy boto3 and botocore modules
    if name == "boto3":
        class DummySession:
            def __init__(self, region_name=None, aws_access_key_id=None, aws_secret_access_key=None, aws_session_token=None):
                self.region_name = region_name
                self.aws_access_key_id = aws_access_key_id
                self.aws_secret_access_key = aws_secret_access_key
                self.aws_session_token = aws_session_token
            def __eq__(self, other):
                # Compare all attributes for equality
                return (
                    isinstance(other, DummySession) and
                    self.region_name == other.region_name and
                    self.aws_access_key_id == other.aws_access_key_id and
                    self.aws_secret_access_key == other.aws_secret_access_key and
                    self.aws_session_token == other.aws_session_token
                )
        return DummySession
    elif name == "botocore":
        class DummyBotocore:
            class exceptions:
                class ClientError(Exception):
                    pass
        return DummyBotocore
    return None

# Patch the required imports for the test environment
boto3 = dummy_get_module("boto3")
botocore = dummy_get_module("botocore")

_logger = logging.getLogger(__name__)
from wandb.sdk.launch.environment.aws_environment import AwsEnvironment

# ------------------- UNIT TESTS -------------------

# 1. Basic Test Cases

@pytest.mark.asyncio
async def test_get_session_basic_success():
    """Test get_session returns a session with correct attributes."""
    env = AwsEnvironment(
        region="us-west-2",
        access_key="AKIA_TEST",
        secret_key="SECRET_TEST",
        session_token="TOKEN_TEST"
    )
    session = await env.get_session()

@pytest.mark.asyncio
async def test_get_session_basic_different_values():
    """Test get_session with different input values."""
    env = AwsEnvironment(
        region="eu-central-1",
        access_key="AKIA_OTHER",
        secret_key="SECRET_OTHER",
        session_token="TOKEN_OTHER"
    )
    session = await env.get_session()

# 2. Edge Test Cases

@pytest.mark.asyncio
async def test_get_session_empty_strings():
    """Test get_session with empty string credentials."""
    env = AwsEnvironment(
        region="",
        access_key="",
        secret_key="",
        session_token=""
    )
    session = await env.get_session()

@pytest.mark.asyncio
async def test_get_session_none_values():
    """Test get_session with None values for credentials."""
    env = AwsEnvironment(
        region=None,
        access_key=None,
        secret_key=None,
        session_token=None
    )
    session = await env.get_session()

@pytest.mark.asyncio
async def test_get_session_concurrent_execution():
    """Test concurrent execution of get_session."""
    env1 = AwsEnvironment("us-east-1", "AKIA1", "SECRET1", "TOKEN1")
    env2 = AwsEnvironment("us-east-2", "AKIA2", "SECRET2", "TOKEN2")
    env3 = AwsEnvironment("us-west-1", "AKIA3", "SECRET3", "TOKEN3")
    # Run get_session concurrently
    sessions = await asyncio.gather(
        env1.get_session(),
        env2.get_session(),
        env3.get_session(),
    )

@pytest.mark.asyncio

async def test_get_session_many_concurrent():
    """Test get_session with many concurrent environments."""
    num_envs = 50
    envs = [
        AwsEnvironment(
            region=f"region-{i}",
            access_key=f"AKIA{i}",
            secret_key=f"SECRET{i}",
            session_token=f"TOKEN{i}",
        )
        for i in range(num_envs)
    ]
    # Run all get_session concurrently
    sessions = await asyncio.gather(*[env.get_session() for env in envs])
    # Validate all sessions
    for i, session in enumerate(sessions):
        pass

@pytest.mark.asyncio
async def test_get_session_large_data_edge():
    """Test get_session with long string values."""
    long_str = "x" * 500
    env = AwsEnvironment(
        region=long_str,
        access_key=long_str,
        secret_key=long_str,
        session_token=long_str
    )
    session = await env.get_session()

# 4. Throughput Test Cases

@pytest.mark.asyncio
async def test_get_session_throughput_small_load():
    """Throughput test: small load of concurrent get_session calls."""
    envs = [
        AwsEnvironment("us-west-2", "AKIA1", "SECRET1", "TOKEN1"),
        AwsEnvironment("us-west-2", "AKIA2", "SECRET2", "TOKEN2"),
        AwsEnvironment("us-west-2", "AKIA3", "SECRET3", "TOKEN3"),
    ]
    sessions = await asyncio.gather(*[env.get_session() for env in envs])
    # All sessions should be unique and correct
    for i, session in enumerate(sessions):
        pass

@pytest.mark.asyncio
async def test_get_session_throughput_medium_load():
    """Throughput test: medium load of concurrent get_session calls."""
    envs = [
        AwsEnvironment(f"region-{i}", f"AKIA{i}", f"SECRET{i}", f"TOKEN{i}")
        for i in range(20)
    ]
    sessions = await asyncio.gather(*[env.get_session() for env in envs])
    for i, session in enumerate(sessions):
        pass

@pytest.mark.asyncio
async def test_get_session_throughput_high_volume():
    """Throughput test: high volume of concurrent get_session calls."""
    envs = [
        AwsEnvironment(f"region-{i}", f"AKIA{i}", f"SECRET{i}", f"TOKEN{i}")
        for i in range(100)
    ]
    sessions = await asyncio.gather(*[env.get_session() for env in envs])
    # Validate a random sample of sessions
    for i in [0, 25, 50, 75, 99]:
        session = sessions[i]
# codeflash_output is used to check that the output of the original code is the same as that of the optimized code.
#------------------------------------------------
import asyncio  # used to run async functions
# --- Function to test (copied exactly as provided) ---
import logging
from typing import Any, cast

import pytest  # used for our unit tests
from wandb.sdk.launch.environment.aws_environment import AwsEnvironment


# Minimal stub for AbstractEnvironment (since we do not import wandb)
class AbstractEnvironment:
    def __init__(self):
        pass

# Minimal stub for LaunchError (since we do not import wandb)
class LaunchError(Exception):
    pass

# Minimal stub for boto3.Session and botocore.exceptions.ClientError
class DummySession:
    def __init__(self, region_name=None, aws_access_key_id=None, aws_secret_access_key=None, aws_session_token=None):
        self.region_name = region_name
        self.aws_access_key_id = aws_access_key_id
        self.aws_secret_access_key = aws_secret_access_key
        self.aws_session_token = aws_session_token

class DummyBoto3:
    class Session(DummySession):
        pass

class DummyBotocore:
    class exceptions:
        class ClientError(Exception):
            pass

# Now, the function under test
_logger = logging.getLogger(__name__)
from wandb.sdk.launch.environment.aws_environment import AwsEnvironment

# --- Unit Tests ---

# 1. Basic Test Cases

@pytest.mark.asyncio
async def test_get_session_basic_success():
    """Test basic session creation with valid credentials."""
    env = AwsEnvironment(
        region="us-west-2",
        access_key="AKIA123456789",
        secret_key="secret",
        session_token="token123"
    )
    session = await env.get_session()

@pytest.mark.asyncio
async def test_get_session_basic_empty_strings():
    """Test session creation with empty string credentials."""
    env = AwsEnvironment(
        region="",
        access_key="",
        secret_key="",
        session_token=""
    )
    session = await env.get_session()

# 2. Edge Test Cases

@pytest.mark.asyncio
async def test_get_session_concurrent_execution():
    """Test concurrent execution of get_session to ensure thread safety and async correctness."""
    env1 = AwsEnvironment("us-east-1", "key1", "secret1", "token1")
    env2 = AwsEnvironment("eu-central-1", "key2", "secret2", "token2")
    # Run both sessions concurrently
    results = await asyncio.gather(
        env1.get_session(),
        env2.get_session()
    )

@pytest.mark.asyncio

async def test_get_session_edge_long_strings():
    """Test session creation with very long strings."""
    long_str = "a" * 512
    env = AwsEnvironment(
        region=long_str,
        access_key=long_str,
        secret_key=long_str,
        session_token=long_str
    )
    session = await env.get_session()

# 3. Large Scale Test Cases

@pytest.mark.asyncio
async def test_get_session_large_scale_concurrent():
    """Test large scale concurrent session creation."""
    num_envs = 50  # Reasonable number to avoid resource exhaustion
    envs = [
        AwsEnvironment(
            region=f"region-{i}",
            access_key=f"access-{i}",
            secret_key=f"secret-{i}",
            session_token=f"token-{i}"
        )
        for i in range(num_envs)
    ]
    # Run all get_session calls concurrently
    sessions = await asyncio.gather(*(env.get_session() for env in envs))
    # Check all sessions are correct
    for i, session in enumerate(sessions):
        pass

@pytest.mark.asyncio
async def test_get_session_large_scale_unique_credentials():
    """Test large scale with unique credential combinations."""
    creds = [
        ("us-east-1", "keyA", "secretA", "tokenA"),
        ("eu-west-1", "keyB", "secretB", "tokenB"),
        ("ap-south-1", "keyC", "secretC", "tokenC"),
        ("us-west-2", "keyD", "secretD", "tokenD"),
        ("ca-central-1", "keyE", "secretE", "tokenE"),
    ]
    envs = [AwsEnvironment(*c) for c in creds]
    sessions = await asyncio.gather(*(env.get_session() for env in envs))
    for i, session in enumerate(sessions):
        region, access, secret, token = creds[i]

# 4. Throughput Test Cases

@pytest.mark.asyncio
async def test_get_session_throughput_small_load():
    """Throughput: Test session creation under small concurrent load."""
    envs = [
        AwsEnvironment("us-west-2", f"key{i}", f"secret{i}", f"token{i}")
        for i in range(5)
    ]
    sessions = await asyncio.gather(*(env.get_session() for env in envs))
    for i, session in enumerate(sessions):
        pass

@pytest.mark.asyncio
async def test_get_session_throughput_medium_load():
    """Throughput: Test session creation under medium concurrent load."""
    envs = [
        AwsEnvironment("us-east-1", f"access{i}", f"secret{i}", f"token{i}")
        for i in range(20)
    ]
    sessions = await asyncio.gather(*(env.get_session() for env in envs))
    for i, session in enumerate(sessions):
        pass

@pytest.mark.asyncio
async def test_get_session_throughput_high_load():
    """Throughput: Test session creation under high concurrent load."""
    envs = [
        AwsEnvironment("eu-west-1", f"key{i}", f"secret{i}", f"token{i}")
        for i in range(100)
    ]
    sessions = await asyncio.gather(*(env.get_session() for env in envs))
    for i, session in enumerate(sessions):
        pass

@pytest.mark.asyncio
async def test_get_session_throughput_sustained_pattern():
    """Throughput: Test sustained session creation pattern."""
    env = AwsEnvironment("ap-northeast-1", "accessX", "secretX", "tokenX")
    # Call get_session repeatedly in sequence
    for _ in range(10):
        session = await env.get_session()
# 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-AwsEnvironment.get_session-mhe4gjol and push.