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REV: Revert #40510 #40818

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Merged
merged 1 commit into from
Apr 7, 2021
Merged

REV: Revert #40510 #40818

merged 1 commit into from
Apr 7, 2021

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jbrockmendel
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@jorisvandenbossche reports that #40510 was performance-hurting, so this rolls it back until we can sort out why that is.

@jreback jreback added Indexing Related to indexing on series/frames, not to indexes themselves Performance Memory or execution speed performance labels Apr 7, 2021
@jreback jreback added this to the 1.3 milestone Apr 7, 2021
@jreback jreback merged commit c2f1271 into pandas-dev:master Apr 7, 2021
@jbrockmendel jbrockmendel deleted the un-take branch April 7, 2021 19:54
@jorisvandenbossche
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Thanks @jbrockmendel !

I checked some of the benchmarks that were affected, and they improved again, see eg https://pandas.pydata.org/speed/pandas/#groupby.GroupByCythonAgg.time_frame_agg?python=3.8&Cython=0.29.21&jinja2=&p-method='mean'
(this one might also be a good case to check what was actually the cause, if you're interested)

JulianWgs pushed a commit to JulianWgs/pandas that referenced this pull request Jul 3, 2021
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