asv_pandas_pr_16443.txt

       before           after         ratio
     [49ec31bb]       [b904308f]
!           24.3s           failed      n/a  panel_methods.PanelMethods.time_pct_change_items
!           20.1s           failed      n/a  panel_methods.PanelMethods.time_pct_change_major
!           21.8s           failed      n/a  panel_methods.PanelMethods.time_pct_change_minor
+      3.74±0.2ms      7.53±0.06ms     2.01  strings.StringMethods.time_contains_few_noregex
+        83.0±3μs          136±4μs     1.64  timeseries.SemiMonthOffset.time_end_incr
+        90.6±4μs          145±6μs     1.60  timeseries.SemiMonthOffset.time_end_incr_n
+         878±3ms            1.34s     1.53  timeseries.SemiMonthOffset.time_end_incr_rng
+        55.5±1ms         82.3±4ms     1.48  packers.HDF.time_write_hdf_table
+     4.47±0.08ms       6.59±0.4ms     1.47  strings.StringMethods.time_get
+     2.60±0.09ms       3.81±0.4ms     1.47  reshape.melt_dataframe.time_melt_dataframe
+      34.5±0.3ms         50.0±2ms     1.45  packers.MsgPack.time_write_msgpack
+      60.1±0.7ms         85.6±2ms     1.42  packers.HDF.time_write_hdf_store
+        590±20μs         840±10μs     1.42  period.Algorithms.time_value_counts_pindex
+         103±3μs          147±8μs     1.42  period.period_standard_indexing.time_series_loc
+      42.5±0.5ms         59.7±3ms     1.40  packers.Pickle.time_write_pickle
+      13.4±0.4μs       18.6±0.7μs     1.38  period.period_standard_indexing.time_shallow_copy
+           127μs            175μs     1.38  panel_methods.PanelMethods.time_shift
+      12.4±0.2ms         17.1±1ms     1.38  strings.StringMethods.time_findall
+     2.71±0.03ms      3.73±0.06ms     1.38  reindex.Duplicates.time_frame_drop_dups_bool
+     4.02±0.09ms       5.54±0.7ms     1.38  strings.StringMethods.time_upper
+        372±10μs         511±20μs     1.37  reindex.FillMethod.time_backfill
+      3.01±0.1ms       4.09±0.1ms     1.36  parser_vb.read_csv3.time_default_converter_with_decimal
+        56.6±1ms         76.1±2ms     1.34  strings.StringMethods.time_extract
+      6.93±0.2ms       9.30±0.7ms     1.34  timeseries.ToDatetime.time_iso8601_format
+     1.49±0.05ms      1.99±0.04ms     1.34  period.period_standard_indexing.time_align
+     4.56±0.07ms      6.04±0.09ms     1.33  reindex.Duplicates.time_frame_drop_dups_inplace
+     2.23±0.09ms       2.93±0.1ms     1.32  frame_ctor.FrameConstructorDTIndexFromOffsets.time_frame_ctor('Week', 2)
+        91.6±2μs          121±6μs     1.32  timeseries.SemiMonthOffset.time_begin_decr_n
+         208±5μs          272±5μs     1.31  period.Constructor.time_from_date_range
+        83.5±2μs         109±10μs     1.31  timeseries.SemiMonthOffset.time_begin_incr
+        88.7±2μs          116±4μs     1.30  timeseries.SemiMonthOffset.time_begin_incr_n
+        807±10μs      1.05±0.02ms     1.30  reindex.Duplicates.time_series_drop_dups_int
+        294±10μs         381±10μs     1.29  period.period_standard_indexing.time_intersection
+     2.23±0.04ms       2.88±0.1ms     1.29  frame_ctor.FrameConstructorDTIndexFromOffsets.time_frame_ctor('Milli', 1)
+           141ms            182ms     1.29  packers.JSON.time_write_json_mixed_delta_int_tstamp
+          18.0ms           23.0ms     1.28  frame_ctor.FrameConstructorDTIndexFromOffsets.time_frame_ctor('FY5253Quarter_1', 1)
+      7.20±0.2ms       9.20±0.2ms     1.28  timeseries.ToDatetime.time_iso8601
+           202ms            257ms     1.27  packers.JSON.time_write_json_lines
+      79.4±0.6ms          101±5ms     1.27  parser_vb.read_csv_categorical.time_convert_post
+      16.3±0.5μs       20.6±0.7μs     1.26  period.Algorithms.time_drop_duplicates_pindex
+     1.78±0.04ms       2.24±0.2ms     1.26  timeseries.ResampleSeries.time_1min_5min_ohlc
+         262±9ms         330±10ms     1.26  join_merge.ConcatPanels.time_f_ordered_axis1
+           1.02s            1.28s     1.26  join_merge.ConcatPanels.time_c_ordered_axis2
+     4.58±0.09ms      5.75±0.03ms     1.26  stat_ops.stats_rolling_mean.time_rolling_max
+         264±7ms          330±3ms     1.25  join_merge.ConcatPanels.time_f_ordered_axis2
+      10.1±0.1ms       12.6±0.7ms     1.25  strings.StringMethods.time_count
+      17.9±0.6ms       22.3±0.3ms     1.25  join_merge.Join.time_join_dataframe_index_single_key_small
+      19.0±0.3μs       23.7±0.5μs     1.24  period.period_standard_indexing.time_get_loc
+     4.80±0.04ms      5.97±0.05ms     1.24  reindex.Duplicates.time_frame_drop_dups_na_inplace
+     2.92±0.09ms       3.63±0.2ms     1.24  parser_vb.read_csv3.time_default_converter
+      4.89±0.1ms       6.07±0.3ms     1.24  strings.StringMethods.time_lstrip
+         141±2ms          175±6ms     1.24  join_merge.Concat.time_concat_series_axis1
+         265±3ms          329±9ms     1.24  strings.StringMethods.time_get_dummies
+           131ms            163ms     1.24  packers.JSON.time_write_json_date_index
+     2.79±0.05ms       3.45±0.1ms     1.24  parser_vb.read_csv3.time_precise_converter
+      5.94±0.2ms       7.35±0.4ms     1.24  strings.StringMethods.time_endswith
+         398±9μs         492±20μs     1.24  timeseries.Offsets.time_custom_bmonthbegin_incr_n
+      3.97±0.1ms       4.91±0.1ms     1.24  strings.StringMethods.time_lower
+      91.4±0.9ms          113±1ms     1.23  reindex.Align.time_align_series_irregular_string
+      4.36±0.1ms       5.37±0.4ms     1.23  period.Algorithms.time_value_counts_pseries
+         176±3ms          216±8ms     1.23  packers.packers_read_json_date_index.time_packers_read_json_date_index
+      8.44±0.1ms       10.4±0.2ms     1.23  strings.StringMethods.time_contains_few
+     3.53±0.09ms       4.32±0.2ms     1.22  timeseries.ResampleDataFrame.time_mean_string
+          67.8ms           83.0ms     1.22  frame_ctor.FrameConstructorDTIndexFromOffsets.time_frame_ctor('FY5253Quarter_2', 1)
+     2.71±0.08ms      3.31±0.06ms     1.22  replace.replace_replacena.time_replace_replacena
+        892±10μs      1.09±0.01ms     1.22  reindex.Duplicates.time_series_drop_dups_string
+      5.00±0.1ms       6.11±0.2ms     1.22  frame_ctor.FrameConstructorDTIndexFromOffsets.time_frame_ctor('WeekOfMonth', 2)
+     2.89±0.09ms       3.52±0.2ms     1.22  timeseries.ResampleSeries.time_resample_datetime64
+      19.0±0.4ms         23.1±2ms     1.22  strings.StringMethods.time_repeat
+     6.31±0.05ms       7.69±0.3ms     1.22  strings.StringMethods.time_pad
+      5.88±0.2ms       7.16±0.2ms     1.22  packers.packers_read_sas.time_read_xport
+      6.46±0.1ms       7.86±0.4ms     1.22  stat_ops.stats_rolling_mean.time_rolling_kurt
+      20.4±0.6ms       24.8±0.7ms     1.22  io_sql.ReadSQLTypes.time_float_read_table_sqlalchemy
+        44.1±1ms         53.6±3ms     1.22  parser_vb.read_csv2.time_comment
+      48.9±0.5ms         59.3±3ms     1.21  io_sql.ReadSQL.time_read_query_sqlalchemy
+           3.13s            3.78s     1.21  join_merge.JoinIndex.time_left_outer_join_index
+      52.3±0.9ms         63.2±2ms     1.21  strings.StringMethods.time_join_split_expand
+     3.83±0.07ms       4.63±0.1ms     1.21  strings.StringMethods.time_len
+     3.70±0.06ms       4.46±0.2ms     1.21  strings.StringMethods.time_contains_many_noregex
+         200±3ms         241±10ms     1.20  plotting.TimeseriesPlotting.time_plot_regular
+           119ms            143ms     1.20  frame_ctor.FrameConstructorDTIndexFromOffsets.time_frame_ctor('FY5253Quarter_2', 2)
+           136ms            164ms     1.20  packers.JSON.time_write_json_mixed_float_int_str
+         108±3ms          129±4ms     1.20  packers.packers_read_sas.time_read_sas7bdat
+          78.0ms           93.4ms     1.20  packers.STATA.time_write_stata_with_validation
+     2.52±0.08ms       3.01±0.1ms     1.20  join_merge.Merge.time_merge_dataframe_integer_key
+      36.1±0.4ms         43.2±2ms     1.20  strings.StringMethods.time_join_split
+      19.1±0.3ms       22.8±0.2ms     1.19  reindex.Duplicates.time_frame_drop_dups_na
+           34.2s            40.8s     1.19  replace.replace_large_dict.time_replace_large_dict
+        97.4±3ms        116±0.6ms     1.19  panel_ctor.Constructors4.time_panel_from_dict_two_different_indexes
+           125ms            149ms     1.19  packers.JSON.time_write_json_T
+        453±10μs         539±10μs     1.19  timeseries.Offsets.time_custom_bmonthend_decr_n
+         321±6ms         380±10ms     1.19  timeseries.ToDatetime.time_iso8601_tz_spaceformat
+     3.53±0.07ms      4.19±0.03ms     1.19  period.Algorithms.time_drop_duplicates_pseries
+         257±6μs         305±10μs     1.19  join_merge.Concat.time_concat_empty_frames2
+     5.56±0.09ms       6.60±0.5ms     1.19  timeseries.SeriesArithmetic.time_add_offset_delta
+      7.05±0.2μs      8.35±0.04μs     1.18  index_object.Float64.time_slice_indexer_even
+     2.32±0.06ms      2.75±0.09ms     1.18  frame_ctor.FrameConstructorDTIndexFromOffsets.time_frame_ctor('Second', 1)
+        56.1±1ms       66.4±0.2ms     1.18  reindex.Duplicates.time_frame_drop_dups_int
+      28.8±0.6ms       34.1±0.6ms     1.18  timedelta.ToTimedelta.time_convert_string
+           118ms            140ms     1.18  packers.JSON.time_write_json
+      25.7±0.7ms         30.4±1ms     1.18  join_merge.MergeAsof.time_on_int32
+           137ms            161ms     1.18  packers.JSON.time_write_json_mixed_float_int_T
+         978±7ns      1.15±0.01μs     1.18  index_object.Float64.time_get
+         407±8μs         478±10μs     1.17  timeseries.Offsets.time_custom_bmonthbegin_decr_n
+           1.46s            1.71s     1.17  join_merge.i8merge.time_i8merge
+        651±10μs          764±8μs     1.17  join_merge.Append.time_append_homogenous
+     1.73±0.06ms      2.03±0.01ms     1.17  series_methods.series_isin_int64.time_series_isin_int64
+     2.30±0.08ms       2.69±0.2ms     1.17  frame_ctor.FrameConstructorDTIndexFromOffsets.time_frame_ctor('Hour', 1)
+      41.5±0.6μs       48.5±0.5μs     1.17  timeseries.Offsets.time_timeseries_year_incr
+      8.20±0.2ms       9.58±0.2ms     1.17  period.Constructor.time_from_pydatetime
+         263±7μs          306±6μs     1.16  join_merge.Concat.time_concat_empty_frames1
+      15.8±0.2ms       18.4±0.3ms     1.16  timeseries.TimeSeries.time_add_irregular
+         209±5ms          244±3ms     1.16  panel_ctor.Constructors1.time_panel_from_dict_all_different_indexes
+        91.0±2ms          106±1ms     1.16  join_merge.Concat.time_concat_small_frames
+        307±20ms          356±2ms     1.16  join_merge.ConcatPanels.time_c_ordered_axis1
+      40.8±0.3μs         47.3±1μs     1.16  timeseries.Offsets.time_custom_bday_incr
+         149±2ms          172±4ms     1.16  io_sql.WriteSQLTypes.time_datetime_sqlalchemy
+        88.3±1μs          102±3μs     1.15  timeseries.SemiMonthOffset.time_begin_decr
+     1.65±0.05ms      1.90±0.08ms     1.15  timeseries.ResampleSeries.time_1min_5min_mean
+        59.8±1ms       68.9±0.9ms     1.15  panel_ctor.Constructors3.time_panel_from_dict_same_index
+          28.5ms           32.8ms     1.15  frame_ctor.FrameConstructorDTIndexFromOffsets.time_frame_ctor('FY5253Quarter_1', 2)
+     6.57±0.06ms       7.56±0.5ms     1.15  sparse.sparse_arithmetic_int.time_sparse_division_1percent
+        860±20ms          987±9ms     1.15  timeseries.SemiMonthOffset.time_begin_incr_rng
+     3.73±0.08ms      4.28±0.09ms     1.15  timeseries.ResampleDataFrame.time_max_numpy
+       156±0.3ms          179±7ms     1.14  packers.packers_read_excel.time_packers_read_excel
+     2.29±0.06ms      2.62±0.06ms     1.14  frame_ctor.FrameConstructorDTIndexFromOffsets.time_frame_ctor('Micro', 2)
+        37.8±1ms         43.3±1ms     1.14  packers.packers_read_hdf_store.time_packers_read_hdf_store
+         845±8ms          967±7ms     1.14  timeseries.SeriesArithmetic.time_add_offset_slow
+         122±3ms          139±3ms     1.14  binary_ops.TimeseriesTZ.time_timestamp_ops_diff2
+        51.3±1ms       58.6±0.7ms     1.14  period.DataFrame.time_setitem_period_column
+         267±3ms         304±20ms     1.14  reshape.reshape_pivot_time_series.time_reshape_pivot_time_series
+      25.5±0.3ms         29.0±1ms     1.14  io_sql.ReadSQLTypes.time_datetime_read_and_parse_sqlalchemy
+         340±7ms          386±3ms     1.13  packers.Excel.time_write_excel_xlwt
+         125±2ms          142±3ms     1.13  join_merge.ConcatFrames.time_f_ordered_axis0
+        820±10ms          927±8ms     1.13  replace.replace_convert.time_replace_frame_timedelta
+     4.17±0.08ms      4.70±0.02ms     1.13  timeseries.DatetimeIndex.time_infer_dst
+      60.6±0.8ms      68.3±0.05ms     1.13  hdfstore_bench.HDF5.time_read_store_table_mixed
+        36.8±2μs       41.4±0.9μs     1.13  timeseries.Offsets.time_timeseries_year_apply
+           126μs            141μs     1.13  panel_methods.PanelMethods.time_shift_minor
+         281±8μs          315±8μs     1.12  reindex.FillMethod.time_pad_float32
+         433±5ms         486±10ms     1.12  packers.Excel.time_write_excel_xlsxwriter
+      58.4±0.7ms         65.5±2ms     1.12  io_sql.WriteSQLTypes.time_float_fallback
+        847±10ms          950±4ms     1.12  timeseries.SemiMonthOffset.time_begin_decr_rng
+         172±1ms          193±5ms     1.12  packers.packers_read_json.time_packers_read_json
+      57.5±0.9ms       64.2±0.8ms     1.12  io_sql.WriteSQLTypes.time_string_fallback
+         189±6ms          210±4ms     1.12  io_sql.WriteSQL.time_sqlalchemy
+      8.71±0.3ms       9.70±0.2ms     1.11  strings.StringMethods.time_contains_many
+         810±3ms         902±10ms     1.11  packers.Excel.time_write_excel_openpyxl
+           182ms            203ms     1.11  packers.JSON.time_write_json_mixed_float_int
+           1.58s            1.75s     1.11  packers.CSV.time_write_csv
+         172±6μs          191±1μs     1.11  index_object.SetOperations.time_datetime_union
+      29.9±0.3ms       33.1±0.4ms     1.11  join_merge.Join.time_join_dataframe_index_multi
+      74.6±0.1ms       82.6±0.1ms     1.11  join_merge.MergeAsof.time_by_object
+           989ms            1.09s     1.11  join_merge.MergeAsof.time_multiby
+        63.2±1ms      69.9±0.01ms     1.11  panel_ctor.Constructors2.time_panel_from_dict_equiv_indexes
+        699±10μs          773±6μs     1.11  timeseries.DatetimeIndex.time_reset_index_tz
+     24.0±0.09ms       26.5±0.7ms     1.10  join_merge.MergeAsof.time_noby
+         368±5μs          407±5μs     1.10  reindex.FillMethod.time_pad
+      1.91±0.02s       2.10±0.04s     1.10  gil.NoGilGroupby.time_groups_4
-      15.8±0.2ms       14.2±0.5ms     0.90  groupby.groupby_agg_builtins.time_groupby_agg_builtins1
-     1.86±0.06ms      1.66±0.05ms     0.89  frame_methods.Interpolate.time_interpolate_some_good
-           35.0s            31.0s     0.89  groupby.GroupBySuite.time_describe('float', 10000)
-      19.1±0.5ms       17.0±0.4ms     0.89  groupby.groupby_categorical.time_groupby_nosort
-      3.44±0.1ms       3.04±0.1ms     0.88  groupby.groupby_categorical.time_groupby_sort
-        24.2±1ms       21.4±0.3ms     0.88  groupby.GroupBySuite.time_diff('int', 100)
-           1.66s            1.47s     0.88  groupby.GroupBySuite.time_all('int', 10000)
-      9.53±0.3ms       8.38±0.2ms     0.88  groupby.Transform.time_transform_ufunc
-        71.6±3ms       62.8±0.8ms     0.88  frame_methods.Dropna.time_count_level_axis1_multi
-      13.9±0.3ms       12.2±0.4ms     0.88  groupby.groupby_float32.time_groupby_sum
-      15.1±0.5ms       13.2±0.4ms     0.87  groupby.groupby_categorical.time_groupby_extra_cat_nosort
-      3.36±0.1ms      2.93±0.06ms     0.87  groupby.groupby_categorical.time_groupby_extra_cat_sort
-      16.7±0.2ms       14.5±0.4ms     0.87  groupby.groupby_agg_multi.time_groupby_multi_different_numpy_functions
-      21.5±0.6ms       18.7±0.2ms     0.87  groupby.groupby_multi.time_groupby_multi_cython
-        409±20μs         355±10μs     0.87  frame_methods.frame_boolean_row_select.time_frame_boolean_row_select
-         758±5ms          655±8ms     0.86  groupby.groupby_frame_apply.time_groupby_frame_apply_df_copy_overhead
-        60.4±3ms       52.1±0.3ms     0.86  categoricals.Categoricals2.time_value_counts
-     3.07±0.08ms       2.64±0.1ms     0.86  binary_ops.Timeseries.time_timestamp_series_compare
-      14.2±0.5ms       12.2±0.2ms     0.86  groupby.Transform.time_transform_multi_key1
-      14.6±0.7ms       12.5±0.3ms     0.86  algorithms.Algorithms.time_add_overflow_neg_scalar
-      9.22±0.1ms      7.93±0.06ms     0.86  binary_ops.Ops.time_frame_mult(False, 'default')
-     9.31±0.09ms      8.00±0.08ms     0.86  binary_ops.Ops.time_frame_mult(False, 1)
-        18.0±1ms       15.4±0.2ms     0.86  frame_methods.frame_fillna_inplace.time_frame_fillna_inplace
-           2.64s            2.27s     0.86  groupby.GroupBySuite.time_rank('int', 10000)
-     1.30±0.09ms      1.11±0.02ms     0.86  groupby.GroupBySuite.time_sem('int', 100)
-         330±2ms          280±4ms     0.85  inference.to_numeric_downcast.time_downcast('string-int', 'unsigned')
-        40.4±2ms       34.3±0.9ms     0.85  groupby.GroupBySuite.time_rank('float', 100)
-         243±3ms          206±6ms     0.84  groupby.GroupBySuite.time_describe('int', 100)
-      4.05±0.1ms       3.39±0.1ms     0.84  groupby.GroupBySuite.time_sum('int', 10000)
-      98.1±0.4ms      82.0±0.01ms     0.84  frame_methods.Dropna.time_count_level_axis1_mixed_dtypes_multi
-           8.45s            6.92s     0.82  groupby.GroupBySuite.time_pct_change('int', 10000)
-         101±2ms       82.4±0.6ms     0.82  binary_ops.Ops.time_frame_comparison(False, 1)
-      3.64±0.1ms      2.98±0.06ms     0.82  groupby.GroupBySuite.time_cumsum('int', 10000)
-      12.8±0.5ms       10.5±0.3ms     0.81  strings.StringMethods.time_match
-      5.22±0.5ms      4.24±0.04ms     0.81  groupby.Transform.time_transform_multi_key4
-      11.7±0.2ms       9.46±0.3ms     0.81  binary_ops.Ops.time_frame_mult(True, 1)
-        28.7±1ms       23.2±0.5ms     0.81  groupby.groupby_categorical.time_groupby_ordered_nosort
-      16.5±0.8ms       13.3±0.3ms     0.81  frame_methods.frame_mask_bools.time_frame_mask_floats
-        35.2±1ms       28.3±0.3ms     0.80  frame_methods.Reindex.time_reindex_both_axes_ix
-      2.65±0.1ms      2.12±0.07ms     0.80  groupby.GroupBySuite.time_tail('int', 100)
-        970±70μs         771±20μs     0.79  groupby.GroupBySuite.time_prod('int', 100)
-      9.65±0.3ms       7.61±0.4ms     0.79  categoricals.Categoricals3.time_rank_int
-        93.8±4ms         73.5±2ms     0.78  groupby.GroupBySuite.time_pct_change('int', 100)
-           2.19s            1.71s     0.78  groupby.groupby_frame_apply.time_groupby_frame_df_copy_function
-         152±5ms          118±3ms     0.77  frame_methods.frame_from_records_generator.time_frame_from_records_generator
-         216±4ms          165±3ms     0.77  frame_methods.frame_insert_100_columns_begin.time_frame_insert_500_columns_end
-      3.57±0.7ms      2.68±0.08ms     0.75  groupby.groupby_datetime.time_groupby_sum
-      11.5±0.2ms       8.62±0.2ms     0.75  binary_ops.Ops.time_frame_add(False, 1)
-        19.7±1ms       14.5±0.2ms     0.74  groupby.groupby_agg_multi.time_groupby_multi_different_functions
-        590±90μs         428±10μs     0.73  groupby.GroupBySuite.time_size('int', 100)
-      14.3±0.7ms      10.00±0.2ms     0.70  groupby.groupby_frame_cython_many_columns.time_sum
-        868±60μs         606±20μs     0.70  groupby.GroupBySuite.time_last('float', 100)
-        53.3±2ms       36.8±0.4ms     0.69  frame_methods.frame_fancy_lookup.time_frame_fancy_lookup_all
-      39.3±0.8ms       26.9±0.6ms     0.69  eval.Eval.time_mult('python', 1)
-      15.0±0.7ms       9.56±0.4ms     0.64  groupby.Transform.time_transform_multi_key2
-      5.13±0.6ms       3.05±0.1ms     0.59  groupby.groupby_categorical.time_groupby_ordered_sort

SOME BENCHMARKS HAVE CHANGED SIGNIFICANTLY.