⚡️ Speed up method Timer.finish by 40% in PR #45415 (tolik0/airbyte-cdk/perpartition-with-global-regression-tests)

[codeflash-ai]

⚡️ This pull request contains optimizations for PR #45415

If you approve this dependent PR, these changes will be merged into the original PR branch tolik0/airbyte-cdk/perpartition-with-global-regression-tests.

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

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📄 Timer.finish() in airbyte-cdk/python/airbyte_cdk/sources/declarative/incremental/global_substream_cursor.py

📈 Performance improved by 40% (0.40x faster)

⏱️ Runtime went down from 3.89 milliseconds to 2.77 milliseconds

Explanation and details

Here's a more optimized version of the program.

Correctness verification

The new optimized code was tested for correctness. The results are listed below.

🔘 (none found) − ⚙️ Existing Unit Tests

✅ 2022 Passed − 🌀 Generated Regression Tests

(click to show generated tests)

# imports
import threading
import time
# function to test
from typing import Optional

import pytest  # used for our unit tests
from airbyte_cdk.sources.declarative.incremental.global_substream_cursor import \
    Timer

# unit tests

# Basic Functionality
def test_timer_basic_functionality():
    timer = Timer()
    timer.start()
    time.sleep(1)
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_timer_fractional_duration():
    timer = Timer()
    timer.start()
    time.sleep(1.5)
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

# Edge Cases
def test_timer_not_started():
    timer = Timer()
    with pytest.raises(RuntimeError, match="Global substream cursor timer not started"):
        timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_timer_immediate_finish():
    timer = Timer()
    timer.start()
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

# Boundary Conditions
def test_timer_minimum_non_zero_duration():
    timer = Timer()
    timer.start()
    time.sleep(0.000001)  # Sleep for a very short duration
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation


def test_timer_multiple_starts_and_stops():
    timer = Timer()
    for _ in range(1000):
        timer.start()
        time.sleep(0.01)
        codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation



def test_timer_multiple_finish_calls():
    timer = Timer()
    timer.start()
    time.sleep(1)
    codeflash_output = timer.finish()
    with pytest.raises(RuntimeError, match="Global substream cursor timer not started"):
        timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_timer_reset():
    timer = Timer()
    timer.start()
    time.sleep(1)
    codeflash_output = timer.finish()
    timer.start()
    time.sleep(2)
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

# Accuracy and Precision
def test_timer_precision_check():
    timer = Timer()
    timer.start()
    time.sleep(1.123456789)
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

# System Clock Changes (Note: These tests are illustrative and may require mocking)
def test_timer_system_clock_backward():
    timer = Timer()
    timer.start()
    time.sleep(1)
    # Simulate system clock going backward
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_timer_system_clock_forward():
    timer = Timer()
    timer.start()
    time.sleep(1)
    # Simulate system clock going forward
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

# Timer Object Reuse
def test_timer_reuse_without_reset():
    timer = Timer()
    timer.start()
    time.sleep(1)
    codeflash_output = timer.finish()
    timer.start()
    time.sleep(2)
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_timer_reuse_after_exception():
    timer = Timer()
    with pytest.raises(RuntimeError):
        timer.finish()
    timer.start()
    time.sleep(1)
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

# Timer Start Overlap
def test_timer_multiple_starts_without_finish():
    timer = Timer()
    timer.start()
    time.sleep(1)
    timer.start()
    time.sleep(1)
    codeflash_output = timer.finish()  # Should only account for the last start
    # Outputs were verified to be equal to the original implementation

# High Precision Timing
def test_timer_sub_microsecond_durations():
    timer = Timer()
    timer.start()
    codeflash_output = timer.finish()  # Immediate finish should be close to zero
    # Outputs were verified to be equal to the original implementation

def test_timer_repeated_short_durations():
    timer = Timer()
    for _ in range(1000):
        timer.start()
        time.sleep(0.000001)  # Sleep for a microsecond
        codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

# System Load and Performance
def test_timer_high_cpu_load():
    timer = Timer()
    timer.start()
    # Simulate high CPU load
    for _ in range(1000000):
        pass
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_timer_high_memory_pressure():
    timer = Timer()
    timer.start()
    # Simulate high memory pressure
    large_list = [0] * 10000000
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

# Unusual System States (Note: These tests are illustrative and may require mocking)
def test_timer_system_sleep_wake():
    timer = Timer()
    timer.start()
    time.sleep(1)
    # Simulate system sleep and wake
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_timer_system_hibernate_resume():
    timer = Timer()
    timer.start()
    time.sleep(1)
    # Simulate system hibernate and resume
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

🔘 (none found) − ⏪ Replay Tests

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