GitHub / pandas-dev/pandas issues and pull requests
Labelled with: Performance
#62694 - PERF: rolling std/var x100 slower in current dev version
Issue -
State: open - Opened by yolking about 1 month ago
- 1 comment
Labels: Performance, Needs Triage
#62309 - PERF: `to_numpy` is >3 orders of magnitude slower on tz aware datetimes
Issue -
State: open - Opened by joshdunnlime 2 months ago
- 2 comments
Labels: Performance, Needs Discussion, Warnings
#62244 - PERF: `DataFrame.unstack()` and `DataFrame.pivot_table()` upcasting take up more memory than needed
Issue -
State: closed - Opened by pabloknecht 3 months ago
- 10 comments
Labels: Performance, Needs Triage, Nullable by default
#62119 - PERF: Pandas parser lib takes 50MB of memory on Windows
Issue -
State: open - Opened by LucaCerina 3 months ago
Labels: Performance, Needs Triage
#61825 - PERF: Brainstorming read_csv perf improvements
Issue -
State: open - Opened by jbrockmendel 4 months ago
- 3 comments
Labels: Performance, IO CSV, Needs Discussion
#61809 - BUG: Pandas Series with Xarray slow print time.
Issue -
State: open - Opened by chaoyupeng 4 months ago
- 1 comment
Labels: Bug, Performance, Output-Formatting, Needs Discussion
#61783 - PERF: Unnecessary string interning in read_csv?
Issue -
State: closed - Opened by jbrockmendel 5 months ago
- 2 comments
Labels: Performance, Needs Triage
#61764 - ENH: speed up wide DataFrame.line plots by using a single LineCollection
Pull Request -
State: open - Opened by EvMossan 5 months ago
Labels: Visualization, Performance
#61747 - PERF: Arrow dtypes are much slower than Numpy for DataFrame.apply
Issue -
State: open - Opened by ehsantn 5 months ago
- 8 comments
Labels: Performance, Apply, Arrow
#61532 - ENH: speed up `DataFrame.plot` using `LineCollection`
Issue -
State: open - Opened by Abdelgha-4 6 months ago
- 5 comments
Labels: Visualization, Performance
#61460 - PERF: Windows Unit Test Timing Out
Issue -
State: open - Opened by MartinBraquet 6 months ago
Labels: Performance, Needs Triage
#61456 - PERF: Setting an item of incompatible dtype
Issue -
State: open - Opened by muhannad125 6 months ago
- 1 comment
Labels: Indexing, Performance, Needs Info
#61320 - PERF: Restore old performances with .isin() on columns typed as np.ui…
Pull Request -
State: closed - Opened by pbrochart 7 months ago
- 3 comments
Labels: Performance, Regression, isin
#61320 - PERF: Restore old performances with .isin() on columns typed as np.ui…
Pull Request -
State: closed - Opened by pbrochart 7 months ago
- 2 comments
Labels: Performance, Regression, isin
#61251 - PERF: future_stack is too slow
Issue -
State: closed - Opened by auderson 8 months ago
- 1 comment
Labels: Performance, Needs Triage
#61116 - Bug: Save original index and remap after function completes
Pull Request -
State: closed - Opened by Jeffrharr 8 months ago
- 3 comments
Labels: Performance, Filters
#61116 - Bug: Save original index and remap after function completes
Pull Request -
State: closed - Opened by Jeffrharr 8 months ago
- 4 comments
Labels: Performance, Filters
#61076 - PERF: why nlargest is so slower?
Issue -
State: open - Opened by ZGarry 9 months ago
Labels: Performance, Needs Triage
#61046 - perf: improve membership check performance in column filtering
Pull Request -
State: closed - Opened by allrob23 9 months ago
- 6 comments
Labels: Performance, IO CSV
#61046 - perf: improve membership check performance in column filtering
Pull Request -
State: closed - Opened by allrob23 9 months ago
- 7 comments
Labels: Performance, IO CSV
#61045 - PERF: Optimize membership check in column filtering for better performance
Issue -
State: closed - Opened by allrob23 9 months ago
Labels: Performance, IO CSV
#61014 - PERF: use `blk.dtype` in `where()` & `_setitem_frame()`
Pull Request -
State: closed - Opened by auderson 9 months ago
- 4 comments
Labels: Performance
#61010 - PERF: bottleneck in `where()`
Issue -
State: closed - Opened by auderson 9 months ago
- 5 comments
Labels: Performance, Needs Triage
#60871 - PERF: Fix groupby skipna performance
Pull Request -
State: closed - Opened by snitish 10 months ago
- 2 comments
Labels: Groupby, Performance
#60871 - PERF: Fix groupby skipna performance
Pull Request -
State: closed - Opened by snitish 10 months ago
- 1 comment
Labels: Groupby, Performance
#60870 - PERF: Regression in groupby ops from adding skipna
Issue -
State: closed - Opened by rhshadrach 10 months ago
- 2 comments
Labels: Groupby, Missing-data, Performance, Regression
#60778 - PERF: Avoid a numpy array copy in ArrowExtensionArray._to_datetimearray
Pull Request -
State: closed - Opened by mroeschke 10 months ago
- 1 comment
Labels: Performance, Arrow
#60778 - PERF: Avoid a numpy array copy in ArrowExtensionArray._to_datetimearray
Pull Request -
State: open - Opened by mroeschke 10 months ago
Labels: Performance, Arrow
#60689 - PERF: Fix ASV CSV benchmarks
Pull Request -
State: closed - Opened by rhshadrach 10 months ago
- 1 comment
Labels: Performance, IO CSV
#60689 - PERF: Fix ASV CSV benchmarks
Pull Request -
State: closed - Opened by rhshadrach 10 months ago
- 1 comment
Labels: Performance, IO CSV
#60483 - Backport PR #60461 on branch 2.3.x (PERF: improve construct_1d_object_array_from_listlike)
Pull Request -
State: closed - Opened by meeseeksmachine 12 months ago
Labels: Performance, Constructors
#60483 - Backport PR #60461 on branch 2.3.x (PERF: improve construct_1d_object_array_from_listlike)
Pull Request -
State: closed - Opened by meeseeksmachine 12 months ago
Labels: Performance, Constructors
#60469 - PERF: regression on mean(axis=1) compared to old pandas version
Issue -
State: open - Opened by Remy-ooo 12 months ago
- 7 comments
Labels: Performance, Copy / view semantics
#60461 - PERF: improve construct_1d_object_array_from_listlike
Pull Request -
State: closed - Opened by jorisvandenbossche 12 months ago
- 3 comments
Labels: Performance, Constructors
#60461 - PERF: improve construct_1d_object_array_from_listlike
Pull Request -
State: closed - Opened by jorisvandenbossche 12 months ago
- 4 comments
Labels: Performance, Constructors
#60213 - PERF: index.unique much slower than get_level_values.drop_duplicates
Issue -
State: open - Opened by jacek-pliszka about 1 year ago
- 1 comment
Labels: Performance, Algos, Closing Candidate
#60203 - PERF: selection inside a row using a list of labels 30 slower than selection by the same individual labels
Issue -
State: closed - Opened by xstreck1 about 1 year ago
- 3 comments
Labels: Indexing, Performance, Closing Candidate
#60179 - PERF: `dropna` with `SparseArray` experiments a much worse time complexity
Issue -
State: open - Opened by mflova about 1 year ago
Labels: Performance, Needs Triage
#60121 - PERF: faster _coerce_to_data_and_mask() for astype("Float64")
Pull Request -
State: closed - Opened by auderson about 1 year ago
- 4 comments
Labels: Performance, NA - MaskedArrays
#60121 - PERF: faster _coerce_to_data_and_mask() for astype("Float64")
Pull Request -
State: closed - Opened by auderson about 1 year ago
- 3 comments
Labels: Performance, NA - MaskedArrays
#60098 - PERF: Slowdowns with .isin() on columns typed as np.uint64
Issue -
State: open - Opened by adrian17 about 1 year ago
Labels: Performance, Needs Triage
#60075 - PERF: DataFrame fragmentation when calling DataFrame.assign() with large kwargs
Issue -
State: open - Opened by y-koj about 1 year ago
Labels: Performance, Needs Triage
#60070 - PERF: Extreme regression in 2.2 when aggregating a DataFrame with .attrs data
Issue -
State: open - Opened by buhrmann about 1 year ago
Labels: Performance, Needs Triage
#60066 - PERF: df.astype("float64[pyarrow]") is slow, df.astype("Float64") is super slow
Issue -
State: closed - Opened by auderson about 1 year ago
- 4 comments
Labels: Performance, good first issue, ExtensionArray, Constructors
#59992 - Potential performance regression with "API: value_counts to consistently maintain order of input"
Issue -
State: closed - Opened by DeaMariaLeon about 1 year ago
- 1 comment
Labels: Groupby, Performance, Algos
#59969 - PERF: Possible Memory Leak when Importing Parquet File with PyArrow Engine in Pandas
Issue -
State: closed - Opened by Voltagabbana about 1 year ago
- 3 comments
Labels: Performance, Needs Info
#59657 - PERF: Melt 2x slower when future.infer_string option enabled
Issue -
State: closed - Opened by maver1ck about 1 year ago
- 4 comments
Labels: Performance, Reshaping, Strings
#59647 - PERF: CategoricalDtype.update_dtype
Pull Request -
State: closed - Opened by mroeschke about 1 year ago
- 2 comments
Labels: Performance, Categorical
#59647 - PERF: CategoricalDtype.update_dtype
Pull Request -
State: closed - Opened by mroeschke about 1 year ago
- 2 comments
Labels: Performance, Categorical
#59643 - PERF: Improve efficiency of `BlockValuesRefs._clear_dead_references(...)`
Pull Request -
State: closed - Opened by Tolker-KU about 1 year ago
Labels: Performance, Copy / view semantics
#59643 - PERF: Improve efficiency of `BlockValuesRefs._clear_dead_references(...)`
Pull Request -
State: closed - Opened by Tolker-KU about 1 year ago
- 1 comment
Labels: Performance, Copy / view semantics
#59630 - PERF: avoid unnecessary copy
Pull Request -
State: closed - Opened by jbrockmendel about 1 year ago
- 2 comments
Labels: Performance, Strings
#59630 - PERF: avoid unnecessary copy
Pull Request -
State: closed - Opened by jbrockmendel about 1 year ago
- 3 comments
Labels: Performance, Strings
#59608 - PERF: Performance Improvement on `DataFrame.to_csv()` when `index=False`
Pull Request -
State: closed - Opened by KevsterAmp about 1 year ago
- 2 comments
Labels: Performance, IO CSV
#59608 - PERF: Performance Improvement on `DataFrame.to_csv()` when `index=False`
Pull Request -
State: closed - Opened by KevsterAmp about 1 year ago
- 3 comments
Labels: Performance, IO CSV
#59598 - PERF: Improve efficiency of `BlockValuesRefs`
Pull Request -
State: closed - Opened by Tolker-KU about 1 year ago
- 2 comments
Labels: Enhancement, Performance, Copy / view semantics
#59598 - PERF: Improve efficiency of `BlockValuesRefs`
Pull Request -
State: closed - Opened by Tolker-KU about 1 year ago
- 3 comments
Labels: Enhancement, Performance, Copy / view semantics
#59578 - PERF: Only clear cached .levels when setting MultiIndex.names
Pull Request -
State: open - Opened by mroeschke about 1 year ago
Labels: Performance, MultiIndex
#59578 - PERF: Only clear cached .levels when setting MultiIndex.names
Pull Request -
State: closed - Opened by mroeschke about 1 year ago
- 1 comment
Labels: Performance, MultiIndex
#59573 - PERF: avoid calling `DataFrame.dtypes` in loop
Pull Request -
State: closed - Opened by messense about 1 year ago
Labels: Performance
#59573 - PERF: avoid calling `DataFrame.dtypes` in loop
Pull Request -
State: closed - Opened by messense about 1 year ago
- 1 comment
Labels: Performance
#59565 - PERF: Native version of `is_hashable`
Pull Request -
State: closed - Opened by Tolker-KU about 1 year ago
- 6 comments
Labels: Performance, hashing, Stale
#59565 - PERF: Native version of `is_hashable`
Pull Request -
State: closed - Opened by Tolker-KU about 1 year ago
- 6 comments
Labels: Performance, hashing, Stale
#59494 - PERF: Excessive memory consumption in pd.read_parquet
Issue -
State: closed - Opened by cotZhong over 1 year ago
- 3 comments
Labels: Performance, Needs Info, IO Parquet
#59312 - PERF: Significant Performance Difference in DataFrame.to_csv() with and without Index Reset
Issue -
State: closed - Opened by hogan-roblox over 1 year ago
- 2 comments
Labels: Performance, IO CSV
#59279 - PERF:
Issue -
State: open - Opened by buhtz over 1 year ago
Labels: Performance, Needs Triage
#59272 - BUG: CoW does not seem to work on an index with duplicated labels
Issue -
State: closed - Opened by arnaudlegout over 1 year ago
- 11 comments
Labels: Performance, Copy / view semantics, Closing Candidate
#59180 - PERF: to_excel slowing runtime
Issue -
State: closed - Opened by OnindoK over 1 year ago
- 2 comments
Labels: Performance, IO Excel, Needs Info
#59178 - PERF: Don't create a CategoricalIndex._engine in __contains__ if categories are RangeIndex
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: Performance, Categorical
#59178 - PERF: Don't create a CategoricalIndex._engine in __contains__ if categories are RangeIndex
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: Performance, Categorical
#59025 - PREF: Fix regression from #58984
Pull Request -
State: closed - Opened by luke396 over 1 year ago
- 2 comments
Labels: Groupby, Performance
#59025 - PREF: Fix regression from #58984
Pull Request -
State: closed - Opened by luke396 over 1 year ago
- 1 comment
Labels: Groupby, Performance
#59002 - Backport PR #58992 on branch 2.2.x (PERF: cache plotting date locators for DatetimeIndex plotting)
Pull Request -
State: closed - Opened by meeseeksmachine over 1 year ago
Labels: Visualization, Performance
#59002 - Backport PR #58992 on branch 2.2.x (PERF: cache plotting date locators for DatetimeIndex plotting)
Pull Request -
State: closed - Opened by meeseeksmachine over 1 year ago
Labels: Visualization, Performance
#58992 - PERF: cache plotting date locators for DatetimeIndex plotting
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: Visualization, Performance
#58992 - PERF: cache plotting date locators for DatetimeIndex plotting
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 3 comments
Labels: Visualization, Performance
#58973 - PERF/CLN: Avoid ravel in plotting
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: Visualization, Performance
#58973 - PERF/CLN: Avoid ravel in plotting
Pull Request -
State: open - Opened by mroeschke over 1 year ago
Labels: Visualization, Performance
#58972 - PERF: Use reshape instead of ravel/flatten
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: Performance, Code Style
#58972 - PERF: Use reshape instead of ravel/flatten
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: Performance, Code Style
#58963 - PERF: 100% CPU utilization with matplotlib (macosx)
Issue -
State: closed - Opened by cinsk over 1 year ago
- 1 comment
Labels: Performance, Needs Triage
#58960 - PERF: Use shallow copies/defer copies in io
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: IO Data, Performance
#58960 - PERF: Use shallow copies/defer copies in io
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: IO Data, Performance
#58958 - PERF: Only copy in plotting when needed
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: Visualization, Performance
#58956 - PERF: groupby is significantly slower for `DatetimeIndex` with timezone
Issue -
State: closed - Opened by veenstrajelmer over 1 year ago
- 2 comments
Labels: Performance, Needs Triage
#58817 - PERF: future_stack=True with non-MulitIndex columns
Pull Request -
State: closed - Opened by rhshadrach over 1 year ago
- 4 comments
Labels: Performance, Reshaping, Stale
#58817 - PERF: future_stack=True with non-MulitIndex columns
Pull Request -
State: open - Opened by rhshadrach over 1 year ago
Labels: Performance, Reshaping
#58733 - PERF: Eliminate circular references in accessor attributes
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
Labels: Performance, Accessors
#58733 - PERF: Eliminate circular references in accessor attributes
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 2 comments
Labels: Performance, Accessors
#58411 - PERF: MultiIndex._engine use smaller dtypes
Pull Request -
State: closed - Opened by GianlucaFicarelli over 1 year ago
- 1 comment
Labels: Performance, MultiIndex
#58411 - PERF: MultiIndex._engine use smaller dtypes
Pull Request -
State: closed - Opened by GianlucaFicarelli over 1 year ago
- 2 comments
Labels: Performance, MultiIndex
#58391 - PERF: df.unstack() is 500 times slower since pandas>=2.1
Issue -
State: open - Opened by sbonz over 1 year ago
Labels: Performance, Needs Triage
#58385 - PERF: MultiIndex.memory_usage shouldn't trigger the index engine
Pull Request -
State: closed - Opened by GianlucaFicarelli over 1 year ago
Labels: Performance, Index
#58385 - PERF: MultiIndex.memory_usage shouldn't trigger the index engine
Pull Request -
State: closed - Opened by GianlucaFicarelli over 1 year ago
- 1 comment
Labels: Performance, Index
#58376 - PERF: RangeIndex.value_counts/searchsorted/to_numpy
Pull Request -
State: open - Opened by mroeschke over 1 year ago
Labels: Performance, Index
#58376 - PERF: RangeIndex.value_counts/searchsorted/to_numpy
Pull Request -
State: closed - Opened by mroeschke over 1 year ago
- 1 comment
Labels: Performance, Index
#58288 - Potential regression induced by commit 1ee5832
Issue -
State: closed - Opened by rhshadrach over 1 year ago
- 2 comments
Labels: IO Data, Performance, Regression
#58287 - Potential regression induced by commit 9cd5e55
Issue -
State: open - Opened by rhshadrach over 1 year ago
Labels: Performance, Regression
#58286 - Potential regression induced by commit eb55bca
Issue -
State: closed - Opened by rhshadrach over 1 year ago
- 2 comments
Labels: Performance, Regression, Timedelta
#58285 - Potential regression induced by commit 924f246
Issue -
State: open - Opened by rhshadrach over 1 year ago
Labels: Performance, Output-Formatting, Regression