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PERF: Series.str.split(expand=True) for pyarrow-backed strings #53585

Merged
merged 2 commits into from
Jun 12, 2023
Merged

PERF: Series.str.split(expand=True) for pyarrow-backed strings #53585

merged 2 commits into from
Jun 12, 2023

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lukemanley
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Perf improvement for Series.str.split with expand=True for ArrowDtype(pa.string()):

import pandas as pd
import pyarrow as pa

N = 10_000
data = ["foo|bar|baz"] * N
ser = pd.Series(data, dtype=pd.ArrowDtype(pa.string()))

%timeit ser.str.split("|", expand=True)

# 93.8 ms ± 2.85 ms per loop (mean ± std. dev. of 7 runs, 10 loops each)  -> main
# 5.43 ms ± 201 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)  -> PR

@lukemanley lukemanley added Performance Memory or execution speed performance Strings String extension data type and string data Arrow pyarrow functionality labels Jun 10, 2023
@lukemanley lukemanley added this to the 2.1 milestone Jun 10, 2023
@mroeschke mroeschke merged commit 94a8af5 into pandas-dev:main Jun 12, 2023
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Nice! Thanks @lukemanley

@lukemanley lukemanley deleted the str-split-expand-arrow branch June 13, 2023 23:27
canthonyscott pushed a commit to canthonyscott/pandas-anthony that referenced this pull request Jun 23, 2023
@lukemanley
PERF: Series.str.split(expand=True) for pyarrow-backed strings (panda…
3cd40a1 
…s-dev#53585)

* PERF: Series.str.split(expand=True) for pyarrow-backed

* gh ref
Daquisu pushed a commit to Daquisu/pandas that referenced this pull request Jul 8, 2023
@lukemanley
PERF: Series.str.split(expand=True) for pyarrow-backed strings (panda…
69c0701 
…s-dev#53585)

* PERF: Series.str.split(expand=True) for pyarrow-backed

* gh ref
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@mroeschke mroeschke mroeschke approved these changes

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Arrow pyarrow functionality Performance Memory or execution speed performance Strings String extension data type and string data
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@lukemanley @mroeschke