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Reduce _idle_semaphore calls in ThreadPoolExecutor #102024

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jackcvr opened this issue Feb 18, 2023 · 2 comments
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Reduce _idle_semaphore calls in ThreadPoolExecutor #102024

jackcvr opened this issue Feb 18, 2023 · 2 comments
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performance Performance or resource usage stdlib Python modules in the Lib dir type-feature A feature request or enhancement

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@jackcvr
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jackcvr commented Feb 18, 2023 •
edited by bedevere-bot

Feature or enhancement

In concurrent.futures.thread.ThredPoolExecutor method executor._idle_semaphore.release() should be called if only work queue is empty

Pitch

Currently _idle_semaphore.release() is called after processing every item in queue. That produces useless semaphore updates in case when queue still has items to process.
The optimization is going to increase processing speed of work queue.

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@jackcvr jackcvr added the type-feature A feature request or enhancement label Feb 18, 2023
@bedevere-bot bedevere-bot mentioned this issue Feb 18, 2023
Merged
@arhadthedev arhadthedev added the stdlib Python modules in the Lib dir label Feb 18, 2023
@jackcvr jackcvr changed the title Reduce IDLE semaphore calls Reduce IDLE semaphore calls in ThreadPoolExecutor Feb 18, 2023
@terryjreedy terryjreedy changed the title Reduce IDLE semaphore calls in ThreadPoolExecutor Reduce _idle_semaphore calls in ThreadPoolExecutor Feb 18, 2023
@terryjreedy
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'IDLE' (capitalized) is the IDE that comes with CPython; it has nothing to do with inactivity ;-).

gpshead pushed a commit that referenced this issue May 26, 2023
@jackcvr @blurb-it @hauntsaninja
gh-102024: Reduced _idle_semaphore.release calls (#102025)
0242e9a 
Reduced _idle_semaphore.release calls in concurrent.futures.thread._worker
_idle_semaphore.release() is now only called if only work_queue is empty.

---------

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
miss-islington pushed a commit to miss-islington/cpython that referenced this issue May 26, 2023
@jackcvr @blurb-it
@hauntsaninja @miss-islington
pythongh-102024: Reduced _idle_semaphore.release calls (pythonGH-102025)
48d7818 
Reduced _idle_semaphore.release calls in concurrent.futures.thread._worker
_idle_semaphore.release() is now only called if only work_queue is empty.

---------

(cherry picked from commit 0242e9a)

Co-authored-by: Andrii Kuzmin <jack.cvr@gmail.com>
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
@bedevere-bot bedevere-bot mentioned this issue May 26, 2023
Merged
@gpshead gpshead added the performance Performance or resource usage label May 26, 2023
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gpshead commented May 26, 2023

thanks!

@gpshead gpshead closed this as completed May 26, 2023
gpshead pushed a commit that referenced this issue May 26, 2023
@miss-islington @jackcvr
@blurb-it @hauntsaninja
[3.12] gh-102024: Reduced _idle_semaphore.release calls (GH-102025) (#…
8010cef 
…104959)

gh-102024: Reduced _idle_semaphore.release calls (GH-102025)

Reduced _idle_semaphore.release calls in concurrent.futures.thread._worker
_idle_semaphore.release() is now only called if only work_queue is empty.

---------

(cherry picked from commit 0242e9a)

Co-authored-by: Andrii Kuzmin <jack.cvr@gmail.com>
Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
@erlend-aasland erlend-aasland mentioned this issue Jun 6, 2023
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performance Performance or resource usage stdlib Python modules in the Lib dir type-feature A feature request or enhancement
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