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Only pure Python decimal module is used in Python 3.15 on Ubuntu #139994

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Only pure Python decimal module is used in Python 3.15 on Ubuntu#139994
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3.15pre-release feature fixes, bugs and security fixesbuildThe build process and cross-buildtype-bugAn unexpected behavior, bug, or error
@serhiy-storchaka

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@serhiy-storchaka
serhiy-storchaka
opened on Oct 12, 2025

Bug report

There is no system libmpdec on Ubuntu 24.04 LTS. So Python 3.15 falls back to pure-Python version for the decimal module.

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    3.15pre-release feature fixes, bugs and security fixesbuildThe build process and cross-buildtype-bugAn unexpected behavior, bug, or error

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