⚡️ Speed up method Timer.finish by 39% in PR #45125 (tolik0/airbyte-cdk/add-per-partition-with-global-fallback)

[codeflash-ai]

⚡️ This pull request contains optimizations for PR #45125

If you approve this dependent PR, these changes will be merged into the original PR branch tolik0/airbyte-cdk/add-per-partition-with-global-fallback.

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 39% (0.39x faster)

⏱️ Runtime went down from 53.5 microseconds to 38.5 microseconds

Explanation and details

Sure, here is the optimized version of your Python program.

Correctness verification

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

🔘 (none found) − ⚙️ Existing Unit Tests

✅ 16 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

def test_basic_functionality():
    # Test basic functionality with a short duration
    timer = Timer()
    timer._start = time.perf_counter_ns()
    time.sleep(1)
    codeflash_output = timer.finish()

    # Test basic functionality with a longer duration
    timer._start = time.perf_counter_ns()
    time.sleep(5)
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_timer_not_started():
    # Test calling finish without starting the timer
    timer = Timer()
    with pytest.raises(RuntimeError):
        timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_immediate_finish():
    # Test calling finish immediately after starting the timer
    timer = Timer()
    timer._start = time.perf_counter_ns()
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_minimum_time_elapsed():
    # Test with the smallest measurable time increment
    timer = Timer()
    timer._start = time.perf_counter_ns()
    time.sleep(0.0000001)
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation


def test_multiple_timers():
    # Test multiple timers operating independently
    timer1 = Timer()
    timer2 = Timer()
    timer1._start = time.perf_counter_ns()
    time.sleep(1)
    timer2._start = time.perf_counter_ns()
    time.sleep(2)
    codeflash_output = timer1.finish()
    codeflash_output = timer2.finish()
    # Outputs were verified to be equal to the original implementation


def test_invalid_state_transitions():
    # Test calling finish multiple times without restarting
    timer = Timer()
    timer._start = time.perf_counter_ns()
    time.sleep(1)
    codeflash_output = timer.finish()
    with pytest.raises(RuntimeError):
        timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_sub_second_precision():
    # Test durations less than a second
    timer = Timer()
    timer._start = time.perf_counter_ns()
    time.sleep(0.5)
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_exact_second_boundaries():
    # Test exact second boundaries
    timer = Timer()
    timer._start = time.perf_counter_ns()
    time.sleep(1)
    codeflash_output = timer.finish()
    timer._start = time.perf_counter_ns()
    time.sleep(2)
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_system_sleep():
    # Test system sleep (simulated)
    timer = Timer()
    timer._start = time.perf_counter_ns()
    time.sleep(1)  # Replace with actual system sleep if possible
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_high_cpu_load():
    # Test with high CPU load
    timer = Timer()
    timer._start = time.perf_counter_ns()
    for _ in range(1000000):
        pass
    time.sleep(1)
    codeflash_output = timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_manual_modification():
    # Test manual modification of _start attribute
    timer = Timer()
    timer._start = time.perf_counter_ns()
    timer._start = "invalid"
    with pytest.raises(TypeError):
        timer.finish()
    # Outputs were verified to be equal to the original implementation

def test_concurrent_modification():
    # Test concurrent modification of _start attribute
    def modify_start(timer):
        timer._start = "invalid"
        # Outputs were verified to be equal to the original implementation

    timer = Timer()
    timer._start = time.perf_counter_ns()
    t = threading.Thread(target=modify_start, args=(timer,))
    t.start()
    t.join()
    with pytest.raises(TypeError):
        timer.finish()
    # Outputs were verified to be equal to the original implementation

🔘 (none found) − ⏪ Replay Tests

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