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CLN: simplify get_values usage in groupby #32523

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Merged
merged 1 commit into from
Mar 11, 2020
Merged

CLN: simplify get_values usage in groupby #32523

merged 1 commit into from
Mar 11, 2020

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jbrockmendel
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This will avoid an object-casting for e.g. IntervalArray-backed ExtensionBlock.

WillAyd
WillAyd reviewed Mar 7, 2020
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Can you check ASV for count?

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WillAyd commented Mar 7, 2020

Or if overkill just a quick timeit

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Or if overkill just a quick timeit

ts = pd.Timestamp("2016-01-01", tz="UTC")
ii = pd.interval_range(start=ts, end=ts + pd.Timedelta(days=10**4))       
df = pd.DataFrame({"A": ii.right, "B": ii.left, "C": ii, "D": ii.left.year})
gb = df.groupby("D")

In [5]: %timeit gb.count()                                                                                                                                                                            
378 µs ± 6.23 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)  # <-- PR
211 ms ± 18.4 ms per loop (mean ± std. dev. of 7 runs, 1 loop each)  # <-- master

WillAyd
WillAyd approved these changes Mar 8, 2020
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Nice!

@jreback jreback added this to the 1.1 milestone Mar 11, 2020
@jreback jreback merged commit 2579484 into pandas-dev:master Mar 11, 2020
@jbrockmendel jbrockmendel deleted the get_values-gbg branch March 11, 2020 03:10
SeeminSyed pushed a commit to CSCD01-team01/pandas that referenced this pull request Mar 22, 2020
@jbrockmendel @SeeminSyed
CLN: simplify get_values usage in groupby (pandas-dev#32523)
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@WillAyd WillAyd WillAyd approved these changes

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