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Pull requests: pandas-dev/pandas
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PERF: preserve block memory layout in Block.copy (GH#60469)
Performance
Memory or execution speed performance
#65302
opened Apr 19, 2026 by
jbrockmendel
Member
•
Draft
BUG: pivot_table margins with EA dtype that cannot hold NA (GH#55484)
Bug
#65301
opened Apr 19, 2026 by
jbrockmendel
Member
•
Draft
3 tasks done
BUG: Improve error message when ExtensionDtype subclass missing 'name' attribute
#65299
opened Apr 19, 2026 by
avasis-ai
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PERF: short-circuit sentinel scans on integer indexers
Performance
Memory or execution speed performance
#65298
opened Apr 19, 2026 by
jbrockmendel
Member
•
Draft
2 tasks done
REF: remove redundant BaseMaskedArray.map override
Refactor
Internal refactoring of code
#65297
opened Apr 19, 2026 by
jbrockmendel
Member
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3 tasks done
REF: simplify _get_indexer_strict and related indexing methods
Refactor
Internal refactoring of code
#65296
opened Apr 19, 2026 by
jbrockmendel
Member
•
Draft
3 tasks done
PERF: unroll take_1d/take_2d inner loops with contig fast path
Performance
Memory or execution speed performance
#65295
opened Apr 19, 2026 by
jbrockmendel
Member
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4 of 7 tasks
BUG: Fix DataFrame.var/std/sem(axis=1) returning object dtype with mixed numeric types
#65294
opened Apr 19, 2026 by
tinezivic
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7 tasks done
BUG: Fix bar plot xticks treating index values as axis positions (#55508)
#65293
opened Apr 19, 2026 by
tinezivic
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DOC: add docstring with examples to NDFrame.__invert__ (~ operator)
#65291
opened Apr 19, 2026 by
RudrenduPaul
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2 tasks done
BUG: Fix to_sql passing incorrect index column name
#65290
opened Apr 19, 2026 by
tianlangqin
Contributor
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6 of 7 tasks
BUG: Fix formatters applied to wrong columns in truncated DataFrame.to_string (GH#35410)
#65288
opened Apr 19, 2026 by
tinezivic
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BUG: Fix regex inference in ArrowExtensionArray._str_split (GH#58321)
#65287
opened Apr 19, 2026 by
tinezivic
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BUG: Categorical.map() sort categories for unordered categoricals (#58153)
#65286
opened Apr 19, 2026 by
tinezivic
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REF: continue moving freq management off DatetimeArray/TimedeltaArray (GH#24566)
Refactor
Internal refactoring of code
#65285
opened Apr 19, 2026 by
jbrockmendel
Member
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2 tasks done
PERF: avoid materializing set/list in isin for common dtype cases
Performance
Memory or execution speed performance
#65284
opened Apr 18, 2026 by
jbrockmendel
Member
•
Draft
4 tasks done
PERF: read_csv emits pyarrow-backed string arrays directly from the C parser
Performance
Memory or execution speed performance
#65283
opened Apr 18, 2026 by
jbrockmendel
Member
•
Draft
4 of 5 tasks
PERF: skip Period-object round-trip when plotting PeriodIndex
Performance
Memory or execution speed performance
#65280
opened Apr 18, 2026 by
jbrockmendel
Member
•
Draft
4 tasks done
PERF: short-circuit sort_index(level=...) on monotonic non-MultiIndex
Performance
Memory or execution speed performance
#65279
opened Apr 18, 2026 by
jbrockmendel
Member
•
Draft
4 tasks done
PERF: speed up DataFrame.plot with DatetimeIndex on wide DataFrames
Performance
Memory or execution speed performance
#65278
opened Apr 18, 2026 by
jbrockmendel
Member
•
Draft
3 tasks done
PERF: speed up tab completion for DataFrame/Series with a large index
Performance
Memory or execution speed performance
#65277
opened Apr 18, 2026 by
jbrockmendel
Member
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3 tasks done
DOC: clarify that column-level attrs are not supported with Copy-on-Write
#65275
opened Apr 18, 2026 by
coolcoder152
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2 of 6 tasks
REF:Avoid state mutation in FrameApply.agg by threading obj and axis …
#65274
opened Apr 18, 2026 by
harrywzl
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4 tasks done
PERF: parallelize nancorr (POC for cython.prange)
#65272
opened Apr 17, 2026 by
jbrockmendel
Member
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3 tasks done
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