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Pull requests list

PERF: missing break in maybe_convert_objects Performance Memory or execution speed performance
#63067 by jbrockmendel was merged Nov 11, 2025 Loading…
1 of 5 tasks
3.0
1
3
PERF: Avoid deep copies when casting dtypes in merge Performance Memory or execution speed performance Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#62902 by phofl was merged Oct 29, 2025 Loading…
3 of 5 tasks
3.0
1
PERF: Shallow copy Series in timeseries plotting Performance Memory or execution speed performance Visualization plotting
#62886 by mroeschke was merged Oct 28, 2025 Loading… 3.0
1
PERF: Assign unique for monotonic but not strictly monotonic index Index Related to the Index class or subclasses Performance Memory or execution speed performance
#62839 by rhshadrach was merged Oct 25, 2025 Loading…
5 tasks
3.0
1
Free dynamically allocated memory prior to returning error Performance Memory or execution speed performance
#62570 by zjweiss-google was merged Oct 4, 2025 Loading… 3.0
3
BUG: Fix Memory Leak in to_json IO JSON read_json, to_json, json_normalize Performance Memory or execution speed performance
#62210 by Alvaro-Kothe was merged Aug 28, 2025 Loading…
2 of 5 tasks
2.3.3
1
3
PERF: Restore old performances with .isin() on columns typed as np.ui… isin isin method Performance Memory or execution speed performance Regression Functionality that used to work in a prior pandas version
#61320 by pbrochart was merged May 19, 2025 Loading…
1 of 5 tasks
3.0
1
4
Bug: Save original index and remap after function completes Filters e.g. head, tail, nth Performance Memory or execution speed performance
#61116 by Jeffrharr was merged Apr 15, 2025 Loading…
5 tasks done
3.0
1
15
perf: improve membership check performance in column filtering IO CSV read_csv, to_csv Performance Memory or execution speed performance
#61046 by allrob23 was merged Apr 26, 2025 Loading…
1 of 5 tasks
3.0
1
7
PERF: use blk.dtype in where() & _setitem_frame() Performance Memory or execution speed performance
#61014 by auderson was merged Feb 28, 2025 Loading…
5 tasks
3.0
1
5
PERF: Fix groupby skipna performance Groupby Performance Memory or execution speed performance
#60871 by snitish was merged Feb 10, 2025 Loading…
5 tasks
3.0
1
3
PERF: Avoid a numpy array copy in ArrowExtensionArray._to_datetimearray Arrow pyarrow functionality Performance Memory or execution speed performance
#60778 by mroeschke was merged Jan 24, 2025 Loading… 3.0
1
PERF: Fix ASV CSV benchmarks IO CSV read_csv, to_csv Performance Memory or execution speed performance
#60689 by rhshadrach was merged Jan 9, 2025 Loading…
5 tasks
3.0
1
Backport PR #60461 on branch 2.3.x (PERF: improve construct_1d_object_array_from_listlike) Constructors Series/DataFrame/Index/pd.array Constructors Performance Memory or execution speed performance
#60483 by meeseeksmachine was merged Dec 3, 2024 Loading… 2.3
PERF: improve construct_1d_object_array_from_listlike Constructors Series/DataFrame/Index/pd.array Constructors Performance Memory or execution speed performance
#60461 by jorisvandenbossche was merged Dec 3, 2024 Loading…
5 tasks
2.3
1
6
PERF: faster _coerce_to_data_and_mask() for astype("Float64") NA - MaskedArrays Related to pd.NA and nullable extension arrays Performance Memory or execution speed performance
#60121 by auderson was merged Oct 30, 2024 Loading…
3 of 5 tasks
3.0
1
7
PERF: CategoricalDtype.update_dtype Categorical Categorical Data Type Performance Memory or execution speed performance
#59647 by mroeschke was merged Sep 5, 2024 Loading… 3.0
2
PERF: Improve efficiency of BlockValuesRefs._clear_dead_references(...) Copy / view semantics Performance Memory or execution speed performance
#59643 by Tolker-KU was merged Aug 28, 2024 Loading…
5 tasks
3.0
6
PERF: avoid unnecessary copy Performance Memory or execution speed performance Strings String extension data type and string data
#59630 by jbrockmendel was merged Aug 27, 2024 Loading…
5 tasks
3.0
3
PERF: Performance Improvement on DataFrame.to_csv() when index=False IO CSV read_csv, to_csv Performance Memory or execution speed performance
#59608 by KevsterAmp was merged Aug 27, 2024 Loading…
5 tasks done
3.0
1
4
PERF: Improve efficiency of BlockValuesRefs Copy / view semantics Enhancement Performance Memory or execution speed performance
#59598 by Tolker-KU was merged Aug 28, 2024 Loading…
5 tasks
3.0
6
PERF: Only clear cached .levels when setting MultiIndex.names MultiIndex Performance Memory or execution speed performance
#59578 by mroeschke was merged Sep 3, 2024 Loading… 3.0
1
PERF: avoid calling DataFrame.dtypes in loop Performance Memory or execution speed performance
#59573 by messense was merged Aug 21, 2024 Loading…
1 of 5 tasks
3.0
1
PERF: Native version of is_hashable hashing hash_pandas_object Performance Memory or execution speed performance Stale
#59565 by Tolker-KU was closed Oct 29, 2024 Loading…
1 of 5 tasks
14
PERF: Don't create a CategoricalIndex._engine in __contains__ if categories are RangeIndex Categorical Categorical Data Type Performance Memory or execution speed performance
#59178 by mroeschke was merged Jul 22, 2024 Loading… 3.0
1
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