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Python 3.14.5rc1 is the fifth maintenance release of 3.14, containing around 113 bugfixes, build improvements and documentation changes since 3.14.4.
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Python 3.14.5rc1 is a release candidate for the fifth maintenance release of 3.14, containing around 113 bugfixes, build improvements and documentation changes since 3.14.4.
Notably, the garbage collector (GC) has changed in Python 3.14.5.
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Notably, the garbage collector (GC) has changed in Python 3.14.5rc1.
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The incremental garbage collector shipped in Python 3.14.0-3.14.4 has been reverted back to the generational garbage collector from 3.13, due to a number of [reports](https://github.com/python/cpython/issues/142516) of significant memory pressure in production environments. See [What's New](https://docs.python.org/3/whatsnew/3.14.html#garbage-collection) and [discuss.python.org](https://discuss.python.org/t/reverting-the-incremental-gc-in-python-3-14-and-3-15/107014) for details.
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