Closed
Description
Pandas version checks
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I have checked that this issue has not already been reported.
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I have confirmed this issue exists on the latest version of pandas.
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I have confirmed this issue exists on the main branch of pandas.
Reproducible Example
import pandas as pd
import numpy as np
from functools import reduce
import operator
data = np.random.randn(10_000, 10) > 0.5 # larger won't even finish
df_numpy = pd.DataFrame(data, dtype=bool)
df_arrow = df_numpy.astype("bool[pyarrow]")
%timeit df_numpy.all(axis="index") # 208 µs ± 813 µs
%timeit df_numpy.all(axis="columns") # 294 µs ± 3.4 µs
%timeit df_arrow.all(axis="index") # 987 µs ± 3.93 µs
%timeit df_arrow.all(axis="columns") # 812 ms ± 7.5 ms (!!!)
%timeit reduce(operator.__and__, (s for _, s in df_arrow.items())) # 421 µs ± 7.65 µs
Larger examples won't even run, so presumably it falls back to some pure python implementation.
Installed Versions
INSTALLED VERSIONS
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commit : 232d84e9a5add831c753e67f1c88863442dc3c92
python : 3.10.11.final.0
python-bits : 64
OS : Linux
OS-release : 5.19.0-50-generic
Version : #50-Ubuntu SMP PREEMPT_DYNAMIC Mon Jul 10 18:24:29 UTC 2023
machine : x86_64
processor : x86_64
byteorder : little
LC_ALL : None
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8
pandas : 2.1.0.dev0+1375.g232d84e9a5
numpy : 1.24.4
pytz : 2023.3
dateutil : 2.8.2
setuptools : 65.5.0
pip : 23.2.1
Cython : 0.29.33
pytest : 7.4.0
hypothesis : 6.82.0
sphinx : 6.2.1
blosc : 1.11.1
feather : None
xlsxwriter : 3.1.2
lxml.etree : 4.9.3
html5lib : 1.1
pymysql : 1.4.6
psycopg2 : 2.9.6
jinja2 : 3.1.2
IPython : 8.14.0
pandas_datareader: None
bs4 : 4.12.2
bottleneck : 1.3.7
brotli :
fastparquet : 2023.7.0
fsspec : 2023.6.0
gcsfs : 2023.6.0
matplotlib : 3.7.2
numba : 0.57.1
numexpr : 2.8.4
odfpy : None
openpyxl : 3.1.2
pandas_gbq : None
pyarrow : 12.0.1
pyreadstat : 1.2.2
pyxlsb : 1.0.10
s3fs : 2023.6.0
scipy : 1.11.1
snappy :
sqlalchemy : 2.0.19
tables : 3.8.0
tabulate : 0.9.0
xarray : 2023.7.0
xlrd : 2.0.1
zstandard : 0.21.0
tzdata : 2023.3
qtpy : None
pyqt5 : None
Prior Performance
No response