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PERF: compute kurtosis for ExtensionArray using groupby method

Groupby

PerformanceMemory or execution speed performanceMemory or execution speed performance

Reduction Operationssum, mean, min, max, etc.sum, mean, min, max, etc.

Status: Merged (completed).

pandas-dev/pandasnumber 63172

#63172 In pandas-dev/pandas;

· by Alvaro-Kothe was closed on Nov 25, 2025

· Updated on Nov 25, 2025

· 

3.0

PERF: missing break in maybe_convert_objects

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Merged (completed).

pandas-dev/pandasnumber 63067

#63067 In pandas-dev/pandas;

· by jbrockmendel was closed on Nov 11, 2025

· Updated on Nov 11, 2025

· 

3.0

PERF: Avoid deep copies when casting dtypes in merge

PerformanceMemory or execution speed performanceMemory or execution speed performance

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Merged (completed).

pandas-dev/pandasnumber 62902

#62902 In pandas-dev/pandas;

· by phofl was closed on Oct 29, 2025

· Updated on Oct 29, 2025

· 

3.0

PERF: Shallow copy Series in timeseries plotting

PerformanceMemory or execution speed performanceMemory or execution speed performance

Visualizationplottingplotting

Status: Merged (completed).

pandas-dev/pandasnumber 62886

#62886 In pandas-dev/pandas;

· by mroeschke was closed on Oct 28, 2025

· Updated on Oct 28, 2025

· 

3.0

PERF: Assign unique for monotonic but not strictly monotonic index

IndexRelated to the Index class or subclassesRelated to the Index class or subclasses

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Merged (completed).

pandas-dev/pandasnumber 62839

#62839 In pandas-dev/pandas;

· by rhshadrach was closed on Oct 25, 2025

· Updated on Oct 25, 2025

· 

3.0

[READY] perf improvements for strftime

DatetimeDatetime data dtypeDatetime data dtype

PerformanceMemory or execution speed performanceMemory or execution speed performance

Stale

Status: Closed (abandoned).

pandas-dev/pandasnumber 51298

#51298 In pandas-dev/pandas;

· by smarie was closed on Oct 5, 2025

· Updated on Oct 5, 2025

Free dynamically allocated memory prior to returning error

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Merged (completed).

pandas-dev/pandasnumber 62570

#62570 In pandas-dev/pandas;

· by zjweiss-google was closed on Oct 4, 2025

· Updated on Oct 4, 2025

· 

3.0

BUG: Fix Memory Leak in to_json

IO JSONread_json, to_json, json_normalizeread_json, to_json, json_normalize

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Merged (completed).

pandas-dev/pandasnumber 62210

#62210 In pandas-dev/pandas;

· by Alvaro-Kothe was closed on Aug 28, 2025

· Updated on Sep 5, 2025

· 

2.3.3

PERF: Restore old performances with .isin() on columns typed as np.ui…

isinisin methodisin method

PerformanceMemory or execution speed performanceMemory or execution speed performance

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

Status: Merged (completed).

pandas-dev/pandasnumber 61320

#61320 In pandas-dev/pandas;

· by pbrochart was closed on May 19, 2025

· Updated on May 19, 2025

· 

3.0

perf: improve membership check performance in column filtering

IO CSVread_csv, to_csvread_csv, to_csv

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Merged (completed).

pandas-dev/pandasnumber 61046

#61046 In pandas-dev/pandas;

· by allrob23 was closed on Apr 26, 2025

· Updated on Apr 26, 2025

· 

3.0

PERF: Improve merge performance

PerformanceMemory or execution speed performanceMemory or execution speed performance

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Stale

Status: Closed (abandoned).

pandas-dev/pandasnumber 57559

#57559 In pandas-dev/pandas;

· by phofl was closed on Apr 15, 2025

· Updated on Apr 15, 2025

Bug: Save original index and remap after function completes

Filterse.g. head, tail, nthe.g. head, tail, nth

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Merged (completed).

pandas-dev/pandasnumber 61116

#61116 In pandas-dev/pandas;

· by Jeffrharr was closed on Apr 15, 2025

· Updated on Apr 15, 2025

· 

3.0