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Pull requests: pandas-dev/pandas
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PERF: DataFrame(ndarr, copy=True) Copy / view semantics Mothballed Temporarily-closed PR the author plans to return to Performance Memory or execution speed performance Stale
#52440 by topper-123 was closed Aug 7, 2023 Loading…
5 tasks done
PERF: Make __iadd__ actually inplace Mothballed Temporarily-closed PR the author plans to return to Numeric Operations Arithmetic, Comparison, and Logical operations Performance Memory or execution speed performance Stale
#52155 by lithomas1 was closed Aug 1, 2023 Loading…
5 tasks
PERF: Split blocks in blk.delete Internals Related to non-user accessible pandas implementation Performance Memory or execution speed performance
BUG: to_datetime with decimal number doesn't fail for %Y%m%d Bug Datetime Datetime data dtype Performance Memory or execution speed performance
#50054 by MarcoGorelli was closed Dec 14, 2022 • Draft
6 tasks done
REGR: be able to read Stata files without reading them fully into memory IO Stata read_stata, to_stata Performance Memory or execution speed performance Stale
SAS7BDAT parser: Fast byteswap IO SAS SAS: read_sas Performance Memory or execution speed performance
PERF: Improve SeriesGroupBy.value_counts performances with categorical values. Groupby Performance Memory or execution speed performance Stale
#46940 by LucasG0 was closed Aug 1, 2022 Loading…
3 of 4 tasks
Series.map Performance Improvement When Using Dictionaries Apply Apply, Aggregate, Transform, Map Performance Memory or execution speed performance Stale
#46348 by ryansdowning was closed May 7, 2022 Loading…
1 of 4 tasks
PERF: avoid double copy in Memory or execution speed performance Stale
to_numpy functions if np.asarray is used Performance #45188 by guitargeek was closed Apr 24, 2022 Loading…
4 tasks
PERF: improve efficiency of Related to indexing on series/frames, not to indexes themselves Performance Memory or execution speed performance
BaseMaskedArray.__setitem__ Indexing BUG: preserve object-dtype index when accessing DataFrame column / PERF: improve perf of Series fastpath constructor Constructors Series/DataFrame/Index/pd.array Constructors Performance Memory or execution speed performance
BUG: Improve memory usage with openpyxl IO Excel read_excel, to_excel Performance Memory or execution speed performance Stale
#41767 by jordanrmerrick was closed Jan 16, 2022 Loading…
3 tasks done
PERF: repeated slicing along index in groupby Groupby Performance Memory or execution speed performance
[WIP] ENH: add Pyarrow csv engine Enhancement IO CSV read_csv, to_csv Performance Memory or execution speed performance Stale
#38370 by arw2019 was closed Jun 8, 2021 Loading…
5 tasks done
PERF: avoid object array cast in pd.isna Benchmark Performance (ASV) benchmarks Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Performance Memory or execution speed performance
#37807 by arw2019 was closed Nov 26, 2020 Loading…
3 of 5 tasks
PERF: array_equivalent Performance Memory or execution speed performance Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#35256 by jbrockmendel was closed Jul 14, 2020 Loading…
PERF: Allow str.split callers to skip expensive post-processing Performance Memory or execution speed performance Stale Strings String extension data type and string data
#35223 by wbadart was closed Sep 30, 2020 Loading…
3 of 4 tasks
Performance regression in stat_ops.FrameMultiIndexOps.time_op Performance Memory or execution speed performance
PERF: pd.to_datetime, unit='s' much slower for float64 than for int64 Datetime Datetime data dtype Performance Memory or execution speed performance
CLN: dont consolidate in indexing Clean Indexing Related to indexing on series/frames, not to indexes themselves Performance Memory or execution speed performance
Add nrows to read json. IO JSON read_json, to_json, json_normalize Performance Memory or execution speed performance
BUG: Changing way of applying numpy functions on Series Performance Memory or execution speed performance
#33775 by mproszewska was closed Jun 9, 2020 Loading…
5 tasks done
PERF: fix #32976 slow group by for categorical columns Categorical Categorical Data Type Performance Memory or execution speed performance Stale
#33739 by rtlee9 was closed Nov 6, 2020 Loading…
5 tasks done
PERF: operate on arrays instead of Series in DataFrame/DataFrame ops Performance Memory or execution speed performance
ENH: Clear index cache after reindex Performance Memory or execution speed performance
#33536 by BaiBaiHi was closed May 22, 2020 Loading…
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