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PERF: GroupBy.std operate blockwise instead of column-wise #43115

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Merged
merged 9 commits into from
Aug 20, 2021

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jbrockmendel
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The relevant cython code already supports 2D, so this is a super-simple fix.

@jreback jreback added this to the 1.4 milestone Aug 20, 2021
@jreback jreback added Performance Memory or execution speed performance Groupby labels Aug 20, 2021
@jreback jreback merged commit f58ee5d into pandas-dev:master Aug 20, 2021
@jbrockmendel jbrockmendel deleted the perf-gb-2 branch August 20, 2021 01:53
feefladder pushed a commit to feefladder/pandas that referenced this pull request Sep 7, 2021
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