8000 PERF: construct DataFrame with string array and dtype=str by topper-123 · Pull Request #36432 · pandas-dev/pandas · GitHub
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PERF: construct DataFrame with string array and dtype=str #36432

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Merged
merged 4 commits into from
Sep 19, 2020
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PERF: construct DataFrame with string array and dtype=str #36432

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PERF: construct DataFrame with string array and dtype=str
topper-123 Sep 17, 2020
f1d66cb
add GH number
topper-123 Sep 17, 2020
5d1dd81
fix dtype issues
topper-123 Sep 17, 2020
256ad70
add ASVs
topper-123 Sep 19, 2020
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add GH number
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@topper-123
topper-123 committed Sep 19, 2020
commit f1d66cb6163f655cb0a4a0aefee7cb6aa8cb1669
2 changes: 1 addition & 1 deletion doc/source/whatsnew/v1.2.0.rst
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Expand Up @@ -222,7 +222,7 @@ Deprecations
Performance improvements
~~~~~~~~~~~~~~~~~~~~~~~~

- Performance improvements when creating Series with dtype `str` or :class:`StringDtype` from array with many string elements (:issue:`36304`, :issue:`36317`, :issue:`36325`)
- Performance improvements when creating DataFrame or Series with dtype `str` or :class:`StringDtype` from array with many string elements (:issue:`36304`, :issue:`36317`, :issue:`36325`, :issue:`36432`)
- Performance improvement in :meth:`GroupBy.agg` with the ``numba`` engine (:issue:`35759`)
- Performance improvements when creating :meth:`pd.Series.map` from a huge dictionary (:issue:`34717`)
- Performance improvement in :meth:`GroupBy.transform` with the ``numba`` engine (:issue:`36240`)
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