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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"dask pyperformance benchmark hangs on win32","articleBody":"# Bug report\r\n\r\n### Bug description:\r\n\r\nThe [dask benchmark](https://github.com/python/pyperformance/tree/main/pyperformance/data-files/benchmarks/bm_dask) in pyperformance hangs indefinitely, only on 32-bit Windows (not any other Tier 1 platform, as far as I can tell).\r\n\r\n`git bisect` has narrowed it down to this commit  1d95451:\r\n\r\n```\r\n1d95451be1f3080904c00cc4c4a6cc519efdf321 is the first bad commit                                                 Author: Victor Stinner \u003cvstinner@python.org\u003e\r\nDate:   Mon Mar 18 17:13:01 2024 +0100\r\ngh-63207: Use GetSystemTimePreciseAsFileTime() in time.time() (#116822)\r\nDoc/whatsnew/3.13.rst                              |  6 ++++\r\n.../2024-03-14-17-21-25.gh-issue-63207.LV16SL.rst  |  4 +++\r\nPython/pytime.c                                    | 38 +++++++++++++---------\r\n3 files changed, 32 insertions(+), 16 deletions(-)\r\ncreate mode 100644 Misc/NEWS.d/next/Library/2024-03-14-17-21-25.gh-issue-63207.LV16SL.rst\r\n```\r\n\r\nCc @vstinner\r\n\r\nTo reproduce:\r\n\r\n```\r\n# Make a venv to install dependencies in\r\ncpython\\PCBuild\\win32\\python.exe -m venv venv\r\ncopy cpython\\PCBuild\\win32\\python313.lib cpython\r\nvenv\\Scripts\\activate\r\npython -m pip install pyperformance\r\npython -m pyperformance run -b dask\r\n```\r\n\r\nI'm working on finding a more self contained reproducer, but may not have time for that immediately, so I thought I would report this in the meantime.  I suspect it is an integer sizing mismatch bug in that commit, given that it doesn't happen on 64-bit Windows.\r\n\r\n[Link to earlier discussion](https://github.com/faster-cpython/benchmarking-public/issues/37)\r\n\r\n### CPython versions tested on:\r\n\r\nCPython main branch\r\n\r\n### Operating systems tested on:\r\n\r\nWindows","author":{"url":"https://github.com/mdboom","@type":"Person","name":"mdboom"},"datePublished":"2024-05-07T14:47:10.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":7},"url":"https://github.com/118715/cpython/issues/118715"}