Add asyncio and threading performance tests for resampling operations

[shauneccles]

Introduce performance tests to verify that the Global Interpreter Lock (GIL) is released during resampling operations, enabling parallel execution in multi-threaded applications. The tests assess the performance improvements and output quality when using different converter types, thread counts and event loops.

[shauneccles]

For reference this is current output on my machine
asyncio

PS C:\Users\shaun\python-samplerate-ledfx> uv run pytest tests/test_asyncio_performance.py -s
Uninstalled 1 package in 7ms
Installed 1 package in 23ms
================================================================ test session starts =================================================================
platform win32 -- Python 3.11.9, pytest-9.0.1, pluggy-1.6.0
rootdir: C:\Users\shaun\python-samplerate-ledfx
configfile: pyproject.toml
plugins: asyncio-1.3.0
asyncio: mode=Mode.STRICT, debug=False, asyncio_default_fixture_loop_scope=None, asyncio_default_test_loop_scope=function
collected 28 items tests\test_asyncio_performance.py
default loop - sinc_fastest async with ThreadPoolExecutor (2 concurrent):
Sequential: 0.0499s
Parallel: 0.0527s
Speedup: 0.95x
Platform: AMD64
⚠️ WARNING: Speedup 0.95x is below expected 1.1x
This may be due to CI load or platform-specific threading overhead.
.
default loop - sinc_fastest async with ThreadPoolExecutor (4 concurrent):
Sequential: 0.1063s
Parallel: 0.1013s
Speedup: 1.05x
Platform: AMD64
⚠️ WARNING: Speedup 1.05x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
default loop - sinc_fastest async with ThreadPoolExecutor (8 concurrent):
Sequential: 0.2039s
Parallel: 0.2019s
Speedup: 1.01x
Platform: AMD64
⚠️ WARNING: Speedup 1.01x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
default loop - sinc_medium async with ThreadPoolExecutor (2 concurrent):
Sequential: 0.0980s
Parallel: 0.0984s
Speedup: 1.00x
Platform: AMD64
⚠️ WARNING: Speedup 1.00x is below expected 1.1x
This may be due to CI load or platform-specific threading overhead.
.
default loop - sinc_medium async with ThreadPoolExecutor (4 concurrent):
Sequential: 0.1956s
Parallel: 0.1965s
Speedup: 1.00x
default loop - sinc_medium async with ThreadPoolExecutor (8 concurrent):
Sequential: 0.4028s
Parallel: 0.3928s
Speedup: 1.03x
Platform: AMD64
⚠️ WARNING: Speedup 1.03x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
default loop - sinc_best async with ThreadPoolExecutor (2 concurrent):
Sequential: 0.3047s
Parallel: 0.3044s
Speedup: 1.00x
Platform: AMD64
⚠️ WARNING: Speedup 1.00x is below expected 1.1x
This may be due to CI load or platform-specific threading overhead.
.
default loop - sinc_best async with ThreadPoolExecutor (4 concurrent):
Sequential: 0.6116s
Parallel: 0.6100s
Speedup: 1.00x
Platform: AMD64
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
default loop - sinc_best async with ThreadPoolExecutor (8 concurrent):
Sequential: 1.2147s
Parallel: 1.2215s
Speedup: 0.99x
Platform: AMD64
⚠️ WARNING: Speedup 0.99x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
winloop loop - sinc_fastest async with ThreadPoolExecutor (2 concurrent):
Sequential: 0.0500s
Parallel: 0.0502s
Speedup: 1.00x
Platform: AMD64
⚠️ WARNING: Speedup 1.00x is below expected 1.1x
This may be due to CI load or platform-specific threading overhead.
.
winloop loop - sinc_fastest async with ThreadPoolExecutor (4 concurrent):
Sequential: 0.0994s
Parallel: 0.0998s
Speedup: 1.00x
Platform: AMD64
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
winloop loop - sinc_fastest async with ThreadPoolExecutor (8 concurrent):
Sequential: 0.1986s
Parallel: 0.2010s
Speedup: 0.99x
Platform: AMD64
⚠️ WARNING: Speedup 0.99x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
winloop loop - sinc_medium async with ThreadPoolExecutor (2 concurrent):
Sequential: 0.0979s
Parallel: 0.0984s
Speedup: 0.99x
Platform: AMD64
⚠️ WARNING: Speedup 0.99x is below expected 1.1x
This may be due to CI load or platform-specific threading overhead.
.
winloop loop - sinc_medium async with ThreadPoolExecutor (4 concurrent):
Sequential: 0.1959s
Parallel: 0.1966s
Speedup: 1.00x
Platform: AMD64
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
winloop loop - sinc_medium async with ThreadPoolExecutor (8 concurrent):
Sequential: 0.3913s
Parallel: 0.3931s
Speedup: 1.00x
Platform: AMD64
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
winloop loop - sinc_best async with ThreadPoolExecutor (2 concurrent):
Sequential: 0.3049s
Parallel: 0.3045s
Speedup: 1.00x
Platform: AMD64
⚠️ WARNING: Speedup 1.00x is below expected 1.1x
This may be due to CI load or platform-specific threading overhead.
.
winloop loop - sinc_best async with ThreadPoolExecutor (4 concurrent):
Sequential: 0.6086s
Parallel: 0.6119s
Speedup: 0.99x
Platform: AMD64
⚠️ WARNING: Speedup 0.99x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
winloop loop - sinc_best async with ThreadPoolExecutor (8 concurrent):
Sequential: 1.2158s
Parallel: 1.2171s
Speedup: 1.00x
Platform: AMD64
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
default loop - sinc_fastest blocking vs executor:
Without executor (blocks loop): 0.0100s
With ThreadPoolExecutor: 0.0107s
Improvement: 0.94x
⚠️ WARNING: Executor not significantly faster than blocking
Expected executor < 0.0077s, got 0.0107s
This may be due to CI load or platform-specific overhead.
.
winloop loop - sinc_fastest blocking vs executor:
Without executor (blocks loop): 0.0099s
With ThreadPoolExecutor: 0.0104s
Improvement: 0.96x
⚠️ WARNING: Executor not significantly faster than blocking
Expected executor < 0.0077s, got 0.0104s
This may be due to CI load or platform-specific overhead.
.
default loop - 2 concurrent tasks - ThreadPool vs ProcessPool:
ThreadPoolExecutor: 0.0204s
ProcessPoolExecutor: 0.1688s
Ratio: 8.29x
→ ThreadPool is faster
(GIL release makes ThreadPool competitive with ProcessPool)
.
default loop - 4 concurrent tasks - ThreadPool vs ProcessPool:
ThreadPoolExecutor: 0.0406s
ProcessPoolExecutor: 0.1846s
Ratio: 4.55x
→ ThreadPool is faster
(GIL release makes ThreadPool competitive with ProcessPool)
.
winloop loop - 2 concurrent tasks - ThreadPool vs ProcessPool:
ThreadPoolExecutor: 0.0202s
ProcessPoolExecutor: 0.1658s
Ratio: 8.21x
→ ThreadPool is faster
(GIL release makes ThreadPool competitive with ProcessPool)
.
winloop loop - 4 concurrent tasks - ThreadPool vs ProcessPool:
ThreadPoolExecutor: 0.0404s
ProcessPoolExecutor: 0.1845s
Ratio: 4.57x
→ ThreadPool is faster
(GIL release makes ThreadPool competitive with ProcessPool)
.
default loop - Mixed I/O and CPU workload:
Total time: 0.2063s
Tasks completed: 5
✓ Performance meets expectations (< 0.35s)
.
winloop loop - Mixed I/O and CPU workload:
Total time: 0.2075s
Tasks completed: 5
✓ Performance meets expectations (< 0.35s)
.
======================================================================
Asyncio Performance Report
======================================================================
Test Configuration:
Sample rate: 44100 Hz
Duration: 5.0 seconds (220500 samples)
Conversion ratio: 2.0x
Executor: ThreadPoolExecutor
----------------------------------------------------------------------
Converter: sinc_fastest
----------------------------------------------------------------------
1 concurrent task (baseline):
Execution time: 0.0252s
2 concurrent tasks:
Parallel execution time: 0.0507s
Equivalent sequential time: 0.0504s (2 × 0.0252s)
Speedup: 0.99x
Parallel efficiency: 49.6%
4 concurrent tasks:
Parallel execution time: 0.1002s
Equivalent sequential time: 0.1007s (4 × 0.0252s)
Speedup: 1.00x
Parallel efficiency: 25.1%
----------------------------------------------------------------------
Converter: sinc_medium
----------------------------------------------------------------------
1 concurrent task (baseline):
Execution time: 0.0497s
2 concurrent tasks:
Parallel execution time: 0.0986s
Equivalent sequential time: 0.0995s (2 × 0.0497s)
Speedup: 1.01x
Parallel efficiency: 50.4%
4 concurrent tasks:
Parallel execution time: 0.1967s
Equivalent sequential time: 0.1990s (4 × 0.0497s)
Speedup: 1.01x
Parallel efficiency: 25.3%
----------------------------------------------------------------------
Converter: sinc_best
----------------------------------------------------------------------
1 concurrent task (baseline):
Execution time: 0.1532s
2 concurrent tasks:
Parallel execution time: 0.3157s
Equivalent sequential time: 0.3064s (2 × 0.1532s)
Speedup: 0.97x
Parallel efficiency: 48.5%
4 concurrent tasks:
Parallel execution time: 0.6162s
Equivalent sequential time: 0.6127s (4 × 0.1532s)
Speedup: 0.99x
Parallel efficiency: 24.9%
.
======================================================================
Asyncio Performance Report
======================================================================
Test Configuration:
Sample rate: 44100 Hz
Duration: 5.0 seconds (220500 samples)
Conversion ratio: 2.0x
Executor: ThreadPoolExecutor
----------------------------------------------------------------------
Converter: sinc_fastest
----------------------------------------------------------------------
1 concurrent task (baseline):
Execution time: 0.0251s
2 concurrent tasks:
Parallel execution time: 0.0505s
Equivalent sequential time: 0.0502s (2 × 0.0251s)
Speedup: 1.00x
Parallel efficiency: 49.8%
4 concurrent tasks:
Parallel execution time: 0.1011s
Equivalent sequential time: 0.1005s (4 × 0.0251s)
Speedup: 0.99x
Parallel efficiency: 24.8%
----------------------------------------------------------------------
Converter: sinc_medium
----------------------------------------------------------------------
1 concurrent task (baseline):
Execution time: 0.0496s
2 concurrent tasks:
Parallel execution time: 0.0986s
Equivalent sequential time: 0.0993s (2 × 0.0496s)
Speedup: 1.01x
Parallel efficiency: 50.4%
4 concurrent tasks:
Parallel execution time: 0.1966s
Equivalent sequential time: 0.1986s (4 × 0.0496s)
Speedup: 1.01x
Parallel efficiency: 25.3%
----------------------------------------------------------------------
Converter: sinc_best
----------------------------------------------------------------------
1 concurrent task (baseline):
Execution time: 0.1528s
2 concurrent tasks:
Parallel execution time: 0.3054s
Equivalent sequential time: 0.3057s (2 × 0.1528s)
Speedup: 1.00x
Parallel efficiency: 50.0%
4 concurrent tasks:
Parallel execution time: 0.6147s
Equivalent sequential time: 0.6113s (4 × 0.1528s)
Speedup: 0.99x
Parallel efficiency: 24.9%

threading

PS C:\Users\shaun\python-samplerate-ledfx> uv run pytest .\tests\test_threading_performance.py -s Uninstalled 1 package in 8ms
Installed 1 package in 10ms
================================================================ test session starts =================================================================
platform win32 -- Python 3.11.9, pytest-9.0.1, pluggy-1.6.0
rootdir: C:\Users\shaun\python-samplerate-ledfx
configfile: pyproject.toml
plugins: asyncio-1.3.0
asyncio: mode=Mode.STRICT, debug=False, asyncio_default_fixture_loop_scope=None, asyncio_default_test_loop_scope=function
collected 38 items tests\test_threading_performance.py
sinc_fastest with 2 threads:
Sequential: 0.0499s
Parallel: 0.0505s
Speedup: 0.99x
Platform: AMD64
Individual thread times: ['0.0250s', '0.0248s']
⚠️ WARNING: Speedup 0.99x is below expected 1.2x
Expected: 1.2x, Got: 0.99x
(sequential=0.0499s, parallel=0.0505s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_fastest with 4 threads:
Sequential: 0.1058s
Parallel: 0.1010s
Speedup: 1.05x
Platform: AMD64
Individual thread times: ['0.0251s', '0.0251s', '0.0250s', '0.0250s']
⚠️ WARNING: Speedup 1.05x is below expected 1.35x
Expected: 1.35x, Got: 1.05x
(sequential=0.1058s, parallel=0.1010s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_fastest with 6 threads:
Sequential: 0.1491s
Parallel: 0.1509s
Speedup: 0.99x
Platform: AMD64
Individual thread times: ['0.0250s', '0.0249s', '0.0251s', '0.0250s', '0.0249s', '0.0249s']
⚠️ WARNING: Speedup 0.99x is below expected 1.35x
Expected: 1.35x, Got: 0.99x
(sequential=0.1491s, parallel=0.1509s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_fastest with 8 threads:
Sequential: 0.1994s
Parallel: 0.2010s
Speedup: 0.99x
Platform: AMD64
Individual thread times: ['0.0249s', '0.0254s', '0.0249s', '0.0249s', '0.0250s', '0.0249s', '0.0248s', '0.0248s']
⚠️ WARNING: Speedup 0.99x is below expected 1.35x
Expected: 1.35x, Got: 0.99x
(sequential=0.1994s, parallel=0.2010s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium with 2 threads:
Sequential: 0.0980s
Parallel: 0.0982s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.0489s', '0.0489s']
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
Expected: 1.2x, Got: 1.00x
(sequential=0.0980s, parallel=0.0982s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium with 4 threads:
Sequential: 0.1961s
Parallel: 0.1983s
Speedup: 0.99x
Platform: AMD64
Individual thread times: ['0.0489s', '0.0490s', '0.0501s', '0.0496s']
⚠️ WARNING: Speedup 0.99x is below expected 1.35x
Expected: 1.35x, Got: 0.99x
(sequential=0.1961s, parallel=0.1983s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium with 6 threads:
Sequential: 0.2936s
Parallel: 0.2966s
Speedup: 0.99x
Platform: AMD64
Individual thread times: ['0.0489s', '0.0491s', '0.0490s', '0.0506s', '0.0490s', '0.0489s']
⚠️ WARNING: Speedup 0.99x is below expected 1.35x
Expected: 1.35x, Got: 0.99x
(sequential=0.2936s, parallel=0.2966s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium with 8 threads:
Sequential: 0.3924s
Parallel: 0.3926s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.0492s', '0.0492s', '0.0489s', '0.0489s', '0.0488s', '0.0488s', '0.0488s', '0.0488s']
⚠️ WARNING: Speedup 1.00x is below expected 1.35x
Expected: 1.35x, Got: 1.00x
(sequential=0.3924s, parallel=0.3926s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_best with 2 threads:
Sequential: 0.3042s
Parallel: 0.3048s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.1523s', '0.1521s']
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
Expected: 1.2x, Got: 1.00x
(sequential=0.3042s, parallel=0.3048s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_best with 4 threads:
Sequential: 0.6091s
Parallel: 0.6084s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.1518s', '0.1517s', '0.1521s', '0.1521s']
⚠️ WARNING: Speedup 1.00x is below expected 1.35x
Expected: 1.35x, Got: 1.00x
(sequential=0.6091s, parallel=0.6084s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_best with 6 threads:
Sequential: 0.9147s
Parallel: 0.9118s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.1521s', '0.1519s', '0.1520s', '0.1517s', '0.1516s', '0.1515s']
⚠️ WARNING: Speedup 1.00x is below expected 1.35x
Expected: 1.35x, Got: 1.00x
(sequential=0.9147s, parallel=0.9118s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_best with 8 threads:
Sequential: 1.2161s
Parallel: 1.2192s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.1520s', '0.1536s', '0.1518s', '0.1518s', '0.1517s', '0.1527s', '0.1522s', '0.1522s']
⚠️ WARNING: Speedup 1.00x is below expected 1.35x
Expected: 1.35x, Got: 1.00x
(sequential=1.2161s, parallel=1.2192s)
This may be due to CI load or platform-specific threading overhead.
.
sinc_fastest Resampler.process() with 2 threads:
Sequential: 0.0501s
Parallel: 0.0519s
Speedup: 0.97x
Platform: AMD64
Individual thread times: ['0.0265s', '0.0248s']
⚠️ WARNING: Speedup 0.97x is below expected 1.1x
This may be due to CI load or platform-specific threading overhead.
.
sinc_fastest Resampler.process() with 4 threads:
Sequential: 0.1036s
Parallel: 0.1010s
Speedup: 1.03x
Platform: AMD64
Individual thread times: ['0.0249s', '0.0251s', '0.0250s', '0.0249s']
⚠️ WARNING: Speedup 1.03x is below expected 1.25x
This may be due to CI load or platform-specific threading overhead.
.
sinc_fastest Resampler.process() with 6 threads:
Sequential: 0.1497s
Parallel: 0.1516s
Speedup: 0.99x
Platform: AMD64
Individual thread times: ['0.0250s', '0.0255s', '0.0250s', '0.0250s', '0.0249s', '0.0250s']
⚠️ WARNING: Speedup 0.99x is below expected 1.25x
This may be due to CI load or platform-specific threading overhead.
.
sinc_fastest Resampler.process() with 8 threads:
Sequential: 0.2064s
Parallel: 0.2013s
Speedup: 1.03x
Platform: AMD64
Individual thread times: ['0.0250s', '0.0251s', '0.0250s', '0.0249s', '0.0250s', '0.0250s', '0.0250s', '0.0249s']
⚠️ WARNING: Speedup 1.03x is below expected 1.25x
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium Resampler.process() with 2 threads:
Sequential: 0.0980s
Parallel: 0.0984s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.0490s', '0.0488s']
⚠️ WARNING: Speedup 1.00x is below expected 1.1x
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium Resampler.process() with 4 threads:
Sequential: 0.1958s
Parallel: 0.1961s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.0488s', '0.0489s', '0.0489s', '0.0488s']
⚠️ WARNING: Speedup 1.00x is below expected 1.25x
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium Resampler.process() with 6 threads:
Sequential: 0.2936s
Parallel: 0.2942s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.0489s', '0.0489s', '0.0488s', '0.0490s', '0.0488s', '0.0488s']
⚠️ WARNING: Speedup 1.00x is below expected 1.25x
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium Resampler.process() with 8 threads:
Sequential: 0.3911s
Parallel: 0.3932s
Speedup: 0.99x
Platform: AMD64
Individual thread times: ['0.0491s', '0.0490s', '0.0490s', '0.0490s', '0.0490s', '0.0489s', '0.0490s', '0.0489s']
⚠️ WARNING: Speedup 0.99x is below expected 1.25x
This may be due to CI load or platform-specific threading overhead.
.
sinc_best Resampler.process() with 2 threads:
Sequential: 0.3034s
Parallel: 0.3042s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.1517s', '0.1519s']
⚠️ WARNING: Speedup 1.00x is below expected 1.1x
This may be due to CI load or platform-specific threading overhead.
.
sinc_best Resampler.process() with 4 threads:
Sequential: 0.6090s
Parallel: 0.6097s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.1518s', '0.1523s', '0.1527s', '0.1520s']
⚠️ WARNING: Speedup 1.00x is below expected 1.25x
This may be due to CI load or platform-specific threading overhead.
.
sinc_best Resampler.process() with 6 threads:
Sequential: 0.9141s
Parallel: 0.9120s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.1523s', '0.1519s', '0.1515s', '0.1519s', '0.1518s', '0.1516s']
⚠️ WARNING: Speedup 1.00x is below expected 1.25x
This may be due to CI load or platform-specific threading overhead.
.
sinc_best Resampler.process() with 8 threads:
Sequential: 1.2158s
Parallel: 1.2170s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.1516s', '0.1521s', '0.1516s', '0.1516s', '0.1517s', '0.1521s', '0.1524s', '0.1524s']
⚠️ WARNING: Speedup 1.00x is below expected 1.25x
This may be due to CI load or platform-specific threading overhead.
.
sinc_fastest CallbackResampler with 2 threads:
Sequential: 0.0503s
Parallel: 0.0517s
Speedup: 0.97x
Platform: AMD64
Individual thread times: ['0.0509s', '0.0255s']
⚠️ WARNING: Speedup 0.97x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
sinc_fastest CallbackResampler with 4 threads:
Sequential: 0.1006s
Parallel: 0.1013s
Speedup: 0.99x
Platform: AMD64
Individual thread times: ['0.0499s', '0.0500s', '0.0504s', '0.0256s']
⚠️ WARNING: Speedup 0.99x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
sinc_fastest CallbackResampler with 6 threads:
Sequential: 0.1515s
Parallel: 0.1519s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.0501s', '0.0504s', '0.0502s', '0.0503s', '0.0501s', '0.0255s']
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
sinc_fastest CallbackResampler with 8 threads:
Sequential: 0.2028s
Parallel: 0.2021s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.0501s', '0.0503s', '0.0503s', '0.0501s', '0.0501s', '0.0502s', '0.0501s', '0.0254s']
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium CallbackResampler with 2 threads:
Sequential: 0.0985s
Parallel: 0.0989s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.0981s', '0.0496s']
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium CallbackResampler with 4 threads:
Sequential: 0.1971s
Parallel: 0.1971s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.0979s', '0.0981s', '0.0981s', '0.0495s']
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium CallbackResampler with 6 threads:
Sequential: 0.2951s
Parallel: 0.2960s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.0980s', '0.0984s', '0.0983s', '0.0983s', '0.0983s', '0.0495s']
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
sinc_medium CallbackResampler with 8 threads:
Sequential: 0.3936s
Parallel: 0.3941s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.0983s', '0.0981s', '0.0981s', '0.0982s', '0.0981s', '0.0981s', '0.0981s', '0.0494s']
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
sinc_best CallbackResampler with 2 threads:
Sequential: 0.3052s
Parallel: 0.3046s
Speedup: 1.00x
Platform: AMD64
Individual thread times: ['0.3036s', '0.1523s']
⚠️ WARNING: Speedup 1.00x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
sinc_best CallbackResampler with 4 threads:
Sequential: 0.6113s
Parallel: 0.6576s
Speedup: 0.93x
Platform: AMD64
Individual thread times: ['0.3029s', '0.3105s', '0.3532s', '0.1948s']
⚠️ WARNING: Speedup 0.93x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
sinc_best CallbackResampler with 6 threads:
Sequential: 1.0773s
Parallel: 1.0299s
Speedup: 1.05x
Platform: AMD64
Individual thread times: ['0.3172s', '0.3112s', '0.3624s', '0.4016s', '0.3482s', '0.1543s']
⚠️ WARNING: Speedup 1.05x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
.
sinc_best CallbackResampler with 8 threads:
Sequential: 1.4173s
Parallel: 1.2259s
Speedup: 1.16x
Platform: AMD64
Individual thread times: ['0.3069s', '0.3045s', '0.3059s', '0.3069s', '0.3054s', '0.3051s', '0.3054s', '0.1532s']
⚠️ WARNING: Speedup 1.16x is below expected 1.2x
This may be due to CI load or platform-specific threading overhead.
..
======================================================================
GIL Release Performance Report
======================================================================
Test Configuration:
Sample rate: 44100 Hz
Duration: 5.0 seconds (220500 samples)
Conversion ratio: 2.0x
----------------------------------------------------------------------
Converter: sinc_fastest
----------------------------------------------------------------------
1 thread (baseline):
Execution time: 0.0250s
2 threads (parallel):
Parallel execution time: 0.0503s
Equivalent sequential time: 0.0499s (2 × 0.0250s)
Speedup: 0.99x
Parallel efficiency: 49.7%
Avg thread time: 0.0249s
4 threads (parallel):
Parallel execution time: 0.1006s
Equivalent sequential time: 0.0998s (4 × 0.0250s)
Speedup: 0.99x
Parallel efficiency: 24.8%
Avg thread time: 0.0250s
----------------------------------------------------------------------
Converter: sinc_medium
----------------------------------------------------------------------
1 thread (baseline):
Execution time: 0.0492s
2 threads (parallel):
Parallel execution time: 0.0985s
Equivalent sequential time: 0.0984s (2 × 0.0492s)
Speedup: 1.00x
Parallel efficiency: 49.9%
Avg thread time: 0.0491s
4 threads (parallel):
Parallel execution time: 0.1976s
Equivalent sequential time: 0.1968s (4 × 0.0492s)
Speedup: 1.00x
Parallel efficiency: 24.9%
Avg thread time: 0.0493s
----------------------------------------------------------------------
Converter: sinc_best
----------------------------------------------------------------------
1 thread (baseline):
Execution time: 0.1518s
2 threads (parallel):
Parallel execution time: 0.3054s
Equivalent sequential time: 0.3036s (2 × 0.1518s)
Speedup: 0.99x
Parallel efficiency: 49.7%
Avg thread time: 0.1525s
4 threads (parallel):
Parallel execution time: 0.6081s
Equivalent sequential time: 0.6073s (4 × 0.1518s)
Speedup: 1.00x
Parallel efficiency: 25.0%
Avg thread time: 0.1519s