Performance Shift(s): d135ebb9

[github-actions]

Benchmark comparison has identified performance shifts at:

• commit d135ebb (Pin dask <2024.9 #6255).

Please review the report below and take corrective/congratulatory action as appropriate :slightly_smiling_face:

⏱️ Performance Benchmark Report: d135ebb

Performance shifts

| Change   | Before [df4c52b6] <main~1>   | After [d135ebb9] <main>   |   Ratio | Benchmark (Parameter)                                         |
|----------|------------------------------|---------------------------|---------|---------------------------------------------------------------|
| +        | 26.0±3ms                     | 38.5±3ms                  |    1.48 | load.LoadAndRealise.time_realise((1280, 960, 5), False, 'FF') |

Full benchmark results

Benchmarks that have stayed the same:

| Change   | Before [df4c52b6] <main~1>   | After [d135ebb9] <main>   |   Ratio | Benchmark (Parameter)                                                                       |
|----------|------------------------------|---------------------------|---------|---------------------------------------------------------------------------------------------|
|          | 59.6±0.6ms                   | 58.8±0.7ms                |    0.99 | aggregate_collapse.Aggregation.time_aggregated_by_COUNT(False)                              |
|          | 60.4±0.8ms                   | 59.5±0.7ms                |    0.98 | aggregate_collapse.Aggregation.time_aggregated_by_COUNT(True)                               |
|          | 212±1ms                      | 214±3ms                   |    1.01 | aggregate_collapse.Aggregation.time_aggregated_by_FAST_PERCENTILE(False)                    |
|          | 214±3ms                      | 210±2ms                   |    0.98 | aggregate_collapse.Aggregation.time_aggregated_by_FAST_PERCENTILE(True)                     |
|          | 38.5±0.3ms                   | 38.2±0.2ms                |    0.99 | aggregate_collapse.Aggregation.time_aggregated_by_GMEAN(False)                              |
|          | 39.2±0.3ms                   | 39.4±0.4ms                |    1    | aggregate_collapse.Aggregation.time_aggregated_by_GMEAN(True)                               |
|          | 38.3±0.3ms                   | 38.3±0.5ms                |    1    | aggregate_collapse.Aggregation.time_aggregated_by_HMEAN(False)                              |
|          | 39.0±0.5ms                   | 39.0±0.3ms                |    1    | aggregate_collapse.Aggregation.time_aggregated_by_HMEAN(True)                               |
|          | 50.5±0.6ms                   | 50.5±0.9ms                |    1    | aggregate_collapse.Aggregation.time_aggregated_by_MAX(False)                                |
|          | 51.7±0.8ms                   | 51.4±0.6ms                |    0.99 | aggregate_collapse.Aggregation.time_aggregated_by_MAX(True)                                 |
|          | 135±1ms                      | 131±2ms                   |    0.97 | aggregate_collapse.Aggregation.time_aggregated_by_MAX_RUN(False)                            |
|          | 136±1ms                      | 131±1ms                   |    0.97 | aggregate_collapse.Aggregation.time_aggregated_by_MAX_RUN(True)                             |
|          | 56.0±1ms                     | 55.5±0.5ms                |    0.99 | aggregate_collapse.Aggregation.time_aggregated_by_MEAN(False)                               |
|          | 58.2±0.8ms                   | 56.8±0.9ms                |    0.98 | aggregate_collapse.Aggregation.time_aggregated_by_MEAN(True)                                |
|          | 38.6±0.3ms                   | 37.9±0.5ms                |    0.98 | aggregate_collapse.Aggregation.time_aggregated_by_MEDIAN(False)                             |
|          | 38.9±0.4ms                   | 38.9±0.6ms                |    1    | aggregate_collapse.Aggregation.time_aggregated_by_MEDIAN(True)                              |
|          | 50.8±0.6ms                   | 51.1±0.4ms                |    1.01 | aggregate_collapse.Aggregation.time_aggregated_by_MIN(False)                                |
|          | 51.9±0.6ms                   | 51.9±0.5ms                |    1    | aggregate_collapse.Aggregation.time_aggregated_by_MIN(True)                                 |
|          | 1.08±0.01s                   | 1.08±0.01s                |    1    | aggregate_collapse.Aggregation.time_aggregated_by_PEAK(False)                               |
|          | 1.08±0.01s                   | 1.09±0.01s                |    1    | aggregate_collapse.Aggregation.time_aggregated_by_PEAK(True)                                |
|          | 478±20ms                     | 485±30ms                  |    1.02 | aggregate_collapse.Aggregation.time_aggregated_by_PERCENTILE(False)                         |
|          | 502±10ms                     | 497±10ms                  |    0.99 | aggregate_collapse.Aggregation.time_aggregated_by_PERCENTILE(True)                          |
|          | 36.6±0.5ms                   | 36.8±0.4ms                |    1    | aggregate_collapse.Aggregation.time_aggregated_by_PROPORTION(False)                         |
|          | 37.3±0.4ms                   | 37.7±0.3ms                |    1.01 | aggregate_collapse.Aggregation.time_aggregated_by_PROPORTION(True)                          |
|          | 67.6±0.6ms                   | 65.6±0.5ms                |    0.97 | aggregate_collapse.Aggregation.time_aggregated_by_RMS(False)                                |
|          | 68.5±0.9ms                   | 67.2±0.8ms                |    0.98 | aggregate_collapse.Aggregation.time_aggregated_by_RMS(True)                                 |
|          | 69.4±0.8ms                   | 68.9±1ms                  |    0.99 | aggregate_collapse.Aggregation.time_aggregated_by_STD_DEV(False)                            |
|          | 70.2±0.8ms                   | 70.3±0.7ms                |    1    | aggregate_collapse.Aggregation.time_aggregated_by_STD_DEV(True)                             |
|          | 64.8±0.7ms                   | 64.8±0.6ms                |    1    | aggregate_collapse.Aggregation.time_aggregated_by_VARIANCE(False)                           |
|          | 66.5±0.8ms                   | 65.8±0.7ms                |    0.99 | aggregate_collapse.Aggregation.time_aggregated_by_VARIANCE(True)                            |
|          | 25.1±0.4ms                   | 25.6±0.2ms                |    1.02 | aggregate_collapse.Aggregation.time_collapsed_by_COUNT(False)                               |
|          | 29.6±0.3ms                   | 29.9±0.6ms                |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_COUNT(True)                                |
|          | 147±1ms                      | 146±3ms                   |    1    | aggregate_collapse.Aggregation.time_collapsed_by_FAST_PERCENTILE(False)                     |
|          | 161±2ms                      | 162±2ms                   |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_FAST_PERCENTILE(True)                      |
|          | 23.5±0.2ms                   | 23.5±0.4ms                |    1    | aggregate_collapse.Aggregation.time_collapsed_by_GMEAN(False)                               |
|          | 27.6±0.3ms                   | 27.9±0.3ms                |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_GMEAN(True)                                |
|          | 23.2±0.3ms                   | 24.0±0.5ms                |    1.03 | aggregate_collapse.Aggregation.time_collapsed_by_HMEAN(False)                               |
|          | 27.8±0.3ms                   | 28.2±0.2ms                |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_HMEAN(True)                                |
|          | 24.4±0.3ms                   | 24.4±0.3ms                |    1    | aggregate_collapse.Aggregation.time_collapsed_by_MAX(False)                                 |
|          | 28.3±0.3ms                   | 28.7±0.2ms                |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_MAX(True)                                  |
|          | 37.4±0.4ms                   | 37.7±2ms                  |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_MAX_RUN(False)                             |
|          | 41.4±0.5ms                   | 41.5±0.6ms                |    1    | aggregate_collapse.Aggregation.time_collapsed_by_MAX_RUN(True)                              |
|          | 24.7±0.3ms                   | 24.6±0.09ms               |    1    | aggregate_collapse.Aggregation.time_collapsed_by_MEAN(False)                                |
|          | 29.1±0.3ms                   | 28.7±0.2ms                |    0.99 | aggregate_collapse.Aggregation.time_collapsed_by_MEAN(True)                                 |
|          | 24.5±0.3ms                   | 24.7±0.4ms                |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_MEDIAN(False)                              |
|          | 28.9±0.2ms                   | 29.1±0.3ms                |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_MEDIAN(True)                               |
|          | 24.1±0.3ms                   | 24.2±0.1ms                |    1    | aggregate_collapse.Aggregation.time_collapsed_by_MIN(False)                                 |
|          | 28.1±0.3ms                   | 28.4±0.3ms                |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_MIN(True)                                  |
|          | 541±4ms                      | 544±4ms                   |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_PEAK(False)                                |
|          | 543±2ms                      | 545±2ms                   |    1    | aggregate_collapse.Aggregation.time_collapsed_by_PEAK(True)                                 |
|          | 162±1ms                      | 159±2ms                   |    0.98 | aggregate_collapse.Aggregation.time_collapsed_by_PERCENTILE(False)                          |
|          | 180±2ms                      | 178±1ms                   |    0.99 | aggregate_collapse.Aggregation.time_collapsed_by_PERCENTILE(True)                           |
|          | 22.9±0.4ms                   | 23.2±0.3ms                |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_PROPORTION(False)                          |
|          | 27.2±0.2ms                   | 27.5±0.2ms                |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_PROPORTION(True)                           |
|          | 26.6±0.3ms                   | 26.5±0.2ms                |    1    | aggregate_collapse.Aggregation.time_collapsed_by_RMS(False)                                 |
|          | 30.6±0.4ms                   | 30.5±0.4ms                |    1    | aggregate_collapse.Aggregation.time_collapsed_by_RMS(True)                                  |
|          | 26.1±0.2ms                   | 26.1±0.4ms                |    1    | aggregate_collapse.Aggregation.time_collapsed_by_STD_DEV(False)                             |
|          | 30.1±0.3ms                   | 30.1±0.2ms                |    1    | aggregate_collapse.Aggregation.time_collapsed_by_STD_DEV(True)                              |
|          | 25.3±0.1ms                   | 25.5±0.2ms                |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_VARIANCE(False)                            |
|          | 29.8±0.3ms                   | 30.0±0.3ms                |    1.01 | aggregate_collapse.Aggregation.time_collapsed_by_VARIANCE(True)                             |
|          | 92.8±0.6ms                   | 90.8±1ms                  |    0.98 | aggregate_collapse.WeightedAggregation.time_w_aggregated_by_MEAN(False)                     |
|          | 94.3±2ms                     | 90.4±1ms                  |    0.96 | aggregate_collapse.WeightedAggregation.time_w_aggregated_by_MEAN(True)                      |
|          | 106±1ms                      | 102±1ms                   |    0.97 | aggregate_collapse.WeightedAggregation.time_w_aggregated_by_RMS(False)                      |
|          | 107±1ms                      | 103±2ms                   |    0.97 | aggregate_collapse.WeightedAggregation.time_w_aggregated_by_RMS(True)                       |
|          | 63.5±0.5ms                   | 62.3±0.9ms                |    0.98 | aggregate_collapse.WeightedAggregation.time_w_aggregated_by_SUM(False)                      |
|          | 64.3±0.7ms                   | 62.2±0.8ms                |    0.97 | aggregate_collapse.WeightedAggregation.time_w_aggregated_by_SUM(True)                       |
|          | 30.2±0.8ms                   | 30.7±0.6ms                |    1.02 | aggregate_collapse.WeightedAggregation.time_w_collapsed_by_MEAN(False)                      |
|          | 34.7±0.6ms                   | 34.9±0.8ms                |    1.01 | aggregate_collapse.WeightedAggregation.time_w_collapsed_by_MEAN(True)                       |
|          | 32.4±0.5ms                   | 31.7±0.3ms                |    0.98 | aggregate_collapse.WeightedAggregation.time_w_collapsed_by_RMS(False)                       |
|          | 36.6±0.6ms                   | 36.3±0.4ms                |    0.99 | aggregate_collapse.WeightedAggregation.time_w_collapsed_by_RMS(True)                        |
|          | 26.6±0.3ms                   | 26.1±0.2ms                |    0.98 | aggregate_collapse.WeightedAggregation.time_w_collapsed_by_SUM(False)                       |
|          | 30.6±0.5ms                   | 30.5±0.3ms                |    0.99 | aggregate_collapse.WeightedAggregation.time_w_collapsed_by_SUM(True)                        |
|          | 330±0.9ms                    | 325±3ms                   |    0.98 | aggregate_collapse.WeightedAggregation.time_w_collapsed_by_WPERCENTILE(False)               |
|          | 352±3ms                      | 340±3ms                   |    0.97 | aggregate_collapse.WeightedAggregation.time_w_collapsed_by_WPERCENTILE(True)                |
|          | 1.12±0.01ms                  | 1.13±0.01ms               |    1.01 | cube.CubeCreation.time_create(False, 'construct')                                           |
|          | 402±5μs                      | 393±3μs                   |    0.98 | cube.CubeCreation.time_create(False, 'instantiate')                                         |
|          | 943±10μs                     | 956±10μs                  |    1.01 | cube.CubeCreation.time_create(True, 'construct')                                            |
|          | 581±6μs                      | 592±5μs                   |    1.02 | cube.CubeCreation.time_create(True, 'instantiate')                                          |
|          | 236±3ms                      | 233±2ms                   |    0.98 | cube.CubeEquality.time_equality(False, False, 'all_equal')                                  |
|          | 127±1ms                      | 126±2ms                   |    1    | cube.CubeEquality.time_equality(False, False, 'coord_inequality')                           |
|          | 260±3ms                      | 258±2ms                   |    0.99 | cube.CubeEquality.time_equality(False, False, 'data_inequality')                            |
|          | 16.9±0.2μs                   | 16.5±0.2μs                |    0.98 | cube.CubeEquality.time_equality(False, False, 'metadata_inequality')                        |
|          | 335±2ms                      | 335±2ms                   |    1    | cube.CubeEquality.time_equality(False, True, 'all_equal')                                   |
|          | 226±1ms                      | 224±1ms                   |    0.99 | cube.CubeEquality.time_equality(False, True, 'coord_inequality')                            |
|          | 360±2ms                      | 360±3ms                   |    1    | cube.CubeEquality.time_equality(False, True, 'data_inequality')                             |
|          | 17.2±0.2μs                   | 17.0±0.2μs                |    0.99 | cube.CubeEquality.time_equality(False, True, 'metadata_inequality')                         |
|          | 233±2ms                      | 235±2ms                   |    1.01 | cube.CubeEquality.time_equality(True, False, 'all_equal')                                   |
|          | 127±1ms                      | 125±1ms                   |    0.99 | cube.CubeEquality.time_equality(True, False, 'coord_inequality')                            |
|          | 256±3ms                      | 259±3ms                   |    1.01 | cube.CubeEquality.time_equality(True, False, 'data_inequality')                             |
|          | 53.6±0.7μs                   | 53.5±0.6μs                |    1    | cube.CubeEquality.time_equality(True, False, 'metadata_inequality')                         |
|          | 331±2ms                      | 334±5ms                   |    1.01 | cube.CubeEquality.time_equality(True, True, 'all_equal')                                    |
|          | 226±3ms                      | 224±2ms                   |    0.99 | cube.CubeEquality.time_equality(True, True, 'coord_inequality')                             |
|          | 361±5ms                      | 356±3ms                   |    0.99 | cube.CubeEquality.time_equality(True, True, 'data_inequality')                              |
|          | 55.1±0.4μs                   | 56.0±0.4μs                |    1.02 | cube.CubeEquality.time_equality(True, True, 'metadata_inequality')                          |
|          | 793±3μs                      | 794±9μs                   |    1    | import_iris.Iris.time__concatenate                                                          |
|          | 177±1μs                      | 180±1μs                   |    1.02 | import_iris.Iris.time__constraints                                                          |
|          | 109±2μs                      | 110±0.8μs                 |    1.01 | import_iris.Iris.time__data_manager                                                         |
|          | 96.5±0.7μs                   | 93.2±0.3μs                |    0.97 | import_iris.Iris.time__deprecation                                                          |
|          | 138±2μs                      | 138±2μs                   |    1    | import_iris.Iris.time__lazy_data                                                            |
|          | 911±10μs                     | 907±4μs                   |    1    | import_iris.Iris.time__merge                                                                |
|          | 76.7±0.7μs                   | 76.9±0.6μs                |    1    | import_iris.Iris.time__representation                                                       |
|          | 582±3μs                      | 589±3μs                   |    1.01 | import_iris.Iris.time_analysis                                                              |
|          | 140±1μs                      | 139±1μs                   |    1    | import_iris.Iris.time_analysis__area_weighted                                               |
|          | 109±0.6μs                    | 109±1μs                   |    1    | import_iris.Iris.time_analysis__grid_angles                                                 |
|          | 241±2μs                      | 240±0.5μs                 |    0.99 | import_iris.Iris.time_analysis__interpolation                                               |
|          | 187±3μs                      | 189±2μs                   |    1.01 | import_iris.Iris.time_analysis__regrid                                                      |
|          | 113±0.7μs                    | 111±0.6μs                 |    0.98 | import_iris.Iris.time_analysis__scipy_interpolate                                           |
|          | 139±1μs                      | 137±2μs                   |    0.99 | import_iris.Iris.time_analysis_calculus                                                     |
|          | 329±5μs                      | 331±1μs                   |    1    | import_iris.Iris.time_analysis_cartography                                                  |
|          | 93.3±0.5μs                   | 94.3±0.4μs                |    1.01 | import_iris.Iris.time_analysis_geomerty                                                     |
|          | 219±1μs                      | 221±4μs                   |    1.01 | import_iris.Iris.time_analysis_maths                                                        |
|          | 98.2±0.7μs                   | 97.0±3μs                  |    0.99 | import_iris.Iris.time_analysis_stats                                                        |
|          | 171±2μs                      | 171±2μs                   |    1    | import_iris.Iris.time_analysis_trajectory                                                   |
|          | 302±4μs                      | 305±3μs                   |    1.01 | import_iris.Iris.time_aux_factory                                                           |
|          | 84.7±1μs                     | 84.8±1μs                  |    1    | import_iris.Iris.time_common                                                                |
|          | 159±0.7μs                    | 165±3μs                   |    1.04 | import_iris.Iris.time_common_lenient                                                        |
|          | 1.33±0.01ms                  | 1.34±0.01ms               |    1    | import_iris.Iris.time_common_metadata                                                       |
|          | 162±1μs                      | 164±1μs                   |    1.01 | import_iris.Iris.time_common_mixin                                                          |
|          | 1.19±0ms                     | 1.18±0.01ms               |    1    | import_iris.Iris.time_common_resolve                                                        |
|          | 197±0.9μs                    | 200±0.8μs                 |    1.01 | import_iris.Iris.time_config                                                                |
|          | 122±0.4μs                    | 123±2μs                   |    1    | import_iris.Iris.time_coord_categorisation                                                  |
|          | 368±4μs                      | 363±2μs                   |    0.98 | import_iris.Iris.time_coord_systems                                                         |
|          | 747±7μs                      | 749±3μs                   |    1    | import_iris.Iris.time_coords                                                                |
|          | 651±7μs                      | 649±7μs                   |    1    | import_iris.Iris.time_cube                                                                  |
|          | 227±2μs                      | 220±2μs                   |    0.97 | import_iris.Iris.time_exceptions                                                            |
|          | 77.5±1μs                     | 77.6±0.8μs                |    1    | import_iris.Iris.time_experimental                                                          |
|          | 184±0.6μs                    | 183±1μs                   |    0.99 | import_iris.Iris.time_fileformats                                                           |
|          | 248±2μs                      | 250±1μs                   |    1    | import_iris.Iris.time_fileformats__ff                                                       |
|          | 2.74±0.02ms                  | 2.65±0.02ms               |    0.97 | import_iris.Iris.time_fileformats__ff_cross_references                                      |
|          | 79.0±0.4μs                   | 78.5±0.4μs                |    0.99 | import_iris.Iris.time_fileformats__pp_lbproc_pairs                                          |
|          | 114±1μs                      | 113±0.6μs                 |    1    | import_iris.Iris.time_fileformats_abf                                                       |
|          | 402±3μs                      | 411±6μs                   |    1.02 | import_iris.Iris.time_fileformats_cf                                                        |
|          | 5.28±0.06ms                  | 5.25±0.05ms               |    1    | import_iris.Iris.time_fileformats_dot                                                       |
|          | 74.1±0.4μs                   | 75.0±1μs                  |    1.01 | import_iris.Iris.time_fileformats_name                                                      |
|          | 258±2μs                      | 257±1μs                   |    1    | import_iris.Iris.time_fileformats_name_loaders                                              |
|          | 119±0.9μs                    | 119±1μs                   |    1    | import_iris.Iris.time_fileformats_netcdf                                                    |
|          | 122±1μs                      | 122±1μs                   |    1    | import_iris.Iris.time_fileformats_nimrod                                                    |
|          | 209±2μs                      | 210±0.8μs                 |    1    | import_iris.Iris.time_fileformats_nimrod_load_rules                                         |
|          | 786±4μs                      | 787±5μs                   |    1    | import_iris.Iris.time_fileformats_pp                                                        |
|          | 180±0.6μs                    | 179±4μs                   |    0.99 | import_iris.Iris.time_fileformats_pp_load_rules                                             |
|          | 136±2μs                      | 133±4μs                   |    0.98 | import_iris.Iris.time_fileformats_pp_save_rules                                             |
|          | 545±1μs                      | 548±3μs                   |    1.01 | import_iris.Iris.time_fileformats_rules                                                     |
|          | 219±1μs                      | 222±5μs                   |    1.01 | import_iris.Iris.time_fileformats_structured_array_identification                           |
|          | 83.9±0.5μs                   | 83.2±0.4μs                |    0.99 | import_iris.Iris.time_fileformats_um                                                        |
|          | 161±0.6μs                    | 159±2μs                   |    0.99 | import_iris.Iris.time_fileformats_um__fast_load                                             |
|          | 136±0.9μs                    | 135±0.4μs                 |    0.99 | import_iris.Iris.time_fileformats_um__fast_load_structured_fields                           |
|          | 76.2±0.6μs                   | 75.7±1μs                  |    0.99 | import_iris.Iris.time_fileformats_um__ff_replacement                                        |
|          | 81.4±2μs                     | 81.2±0.7μs                |    1    | import_iris.Iris.time_fileformats_um__optimal_array_structuring                             |
|          | 991±7μs                      | 975±6μs                   |    0.98 | import_iris.Iris.time_fileformats_um_cf_map                                                 |
|          | 136±3μs                      | 135±1μs                   |    0.99 | import_iris.Iris.time_io                                                                    |
|          | 174±2μs                      | 174±3μs                   |    1    | import_iris.Iris.time_io_format_picker                                                      |
|          | 283±2μs                      | 286±2μs                   |    1.01 | import_iris.Iris.time_iris                                                                  |
|          | 127±1μs                      | 127±0.7μs                 |    1    | import_iris.Iris.time_iterate                                                               |
|          | 8.13±0.05ms                  | 8.23±0.08ms               |    1.01 | import_iris.Iris.time_palette                                                               |
|          | 1.89±0.01ms                  | 1.90±0ms                  |    1.01 | import_iris.Iris.time_plot                                                                  |
|          | 104±1μs                      | 104±0.7μs                 |    1    | import_iris.Iris.time_quickplot                                                             |
|          | 2.19±0.01ms                  | 2.15±0.03ms               |    0.98 | import_iris.Iris.time_std_names                                                             |
|          | 1.75±0.03ms                  | 1.78±0ms                  |    1.02 | import_iris.Iris.time_symbols                                                               |
|          | 33.5±0.8ms                   | 33.8±0.6ms                |    1.01 | import_iris.Iris.time_tests                                                                 |
|          | 252±1μs                      | 257±1μs                   |    1.02 | import_iris.Iris.time_third_party_cartopy                                                   |
|          | 4.77±0.02ms                  | 4.75±0.03ms               |    1    | import_iris.Iris.time_third_party_cf_units                                                  |
|          | 120±0.8μs                    | 119±0.8μs                 |    0.99 | import_iris.Iris.time_third_party_cftime                                                    |
|          | 2.80±0.01ms                  | 2.90±0.01ms               |    1.03 | import_iris.Iris.time_third_party_matplotlib                                                |
|          | 1.53±0.03ms                  | 1.54±0.01ms               |    1    | import_iris.Iris.time_third_party_numpy                                                     |
|          | 172±2μs                      | 171±1μs                   |    0.99 | import_iris.Iris.time_third_party_scipy                                                     |
|          | 101±0.9μs                    | 101±2μs                   |    1    | import_iris.Iris.time_time                                                                  |
|          | 328±4μs                      | 323±2μs                   |    0.99 | import_iris.Iris.time_util                                                                  |
|          | 72.7±1μs                     | 70.9±1μs                  |    0.98 | iterate.IZip.time_izip                                                                      |
|          | 9.98±0.04ms                  | 10.0±0.1ms                |    1.01 | load.LoadAndRealise.time_load((1280, 960, 5), False, 'FF')                                  |
|          | 26.2±0.6ms                   | 27.5±0.6ms                |    1.05 | load.LoadAndRealise.time_load((1280, 960, 5), False, 'NetCDF')                              |
|          | 9.97±0.08ms                  | 10.2±0.05ms               |    1.02 | load.LoadAndRealise.time_load((1280, 960, 5), False, 'PP')                                  |
|          | 9.86±0.2ms                   | 10.1±0.2ms                |    1.03 | load.LoadAndRealise.time_load((1280, 960, 5), True, 'FF')                                   |
|          | 22.0±0.3ms                   | 22.4±0.06ms               |    1.02 | load.LoadAndRealise.time_load((1280, 960, 5), True, 'NetCDF')                               |
|          | 9.91±0.06ms                  | 10.2±0.1ms                |    1.03 | load.LoadAndRealise.time_load((1280, 960, 5), True, 'PP')                                   |
|          | 1.58±0.01s                   | 1.60±0.02s                |    1.02 | load.LoadAndRealise.time_load((2, 2, 1000), False, 'FF')                                    |
|          | 22.5±0.4ms                   | 22.8±0.07ms               |    1.01 | load.LoadAndRealise.time_load((2, 2, 1000), False, 'NetCDF')                                |
|          | 1.58±0.02s                   | 1.59±0.02s                |    1.01 | load.LoadAndRealise.time_load((2, 2, 1000), False, 'PP')                                    |
|          | 1.58±0.02s                   | 1.58±0.01s                |    1    | load.LoadAndRealise.time_load((2, 2, 1000), True, 'FF')                                     |
|          | 22.1±0.1ms                   | 22.8±0.2ms                |    1.03 | load.LoadAndRealise.time_load((2, 2, 1000), True, 'NetCDF')                                 |
|          | 1.57±0.01s                   | 1.62±0.02s                |    1.03 | load.LoadAndRealise.time_load((2, 2, 1000), True, 'PP')                                     |
|          | 5.08±0.04ms                  | 5.19±0.05ms               |    1.02 | load.LoadAndRealise.time_load((50, 50, 2), False, 'FF')                                     |
|          | 20.6±0.2ms                   | 21.8±0.6ms                |    1.06 | load.LoadAndRealise.time_load((50, 50, 2), False, 'NetCDF')                                 |
|          | 5.05±0.06ms                  | 5.14±0.1ms                |    1.02 | load.LoadAndRealise.time_load((50, 50, 2), False, 'PP')                                     |
|          | 5.09±0.02ms                  | 5.17±0.2ms                |    1.02 | load.LoadAndRealise.time_load((50, 50, 2), True, 'FF')                                      |
|          | 20.6±0.2ms                   | 21.1±1ms                  |    1.02 | load.LoadAndRealise.time_load((50, 50, 2), True, 'NetCDF')                                  |
|          | 5.04±0.05ms                  | 5.10±0.3ms                |    1.01 | load.LoadAndRealise.time_load((50, 50, 2), True, 'PP')                                      |
|          | 19.9±0.2ms                   | 19.8±0.4ms                |    1    | load.LoadAndRealise.time_realise((1280, 960, 5), False, 'NetCDF')                           |
|          | 13.5±0.9ms                   | 13.4±1ms                  |    0.99 | load.LoadAndRealise.time_realise((1280, 960, 5), False, 'PP')                               |
|          | 26.7±1ms                     | 26.5±2ms                  |    0.99 | load.LoadAndRealise.time_realise((1280, 960, 5), True, 'FF')                                |
|          | 78.8±0.4ms                   | 71.5±2ms                  |    0.91 | load.LoadAndRealise.time_realise((1280, 960, 5), True, 'NetCDF')                            |
|          | 26.8±2ms                     | 26.6±2ms                  |    0.99 | load.LoadAndRealise.time_realise((1280, 960, 5), True, 'PP')                                |
|          | 479±2ms                      | 482±5ms                   |    1.01 | load.LoadAndRealise.time_realise((2, 2, 1000), False, 'FF')                                 |
|          | 2.78±0.05ms                  | 2.85±0.3ms                |    1.03 | load.LoadAndRealise.time_realise((2, 2, 1000), False, 'NetCDF')                             |
|          | 481±4ms                      | 485±20ms                  |    1.01 | load.LoadAndRealise.time_realise((2, 2, 1000), False, 'PP')                                 |
|          | 493±3ms                      | 496±7ms                   |    1.01 | load.LoadAndRealise.time_realise((2, 2, 1000), True, 'FF')                                  |
|          | 2.88±0.07ms                  | 2.97±0.08ms               |    1.03 | load.LoadAndRealise.time_realise((2, 2, 1000), True, 'NetCDF')                              |
|          | 488±4ms                      | 497±4ms                   |    1.02 | load.LoadAndRealise.time_realise((2, 2, 1000), True, 'PP')                                  |
|          | 1.66±0.03ms                  | 1.67±0.06ms               |    1    | load.LoadAndRealise.time_realise((50, 50, 2), False, 'FF')                                  |
|          | 2.76±0.08ms                  | 2.81±0.09ms               |    1.02 | load.LoadAndRealise.time_realise((50, 50, 2), False, 'NetCDF')                              |
|          | 1.66±0.09ms                  | 1.70±0.07ms               |    1.03 | load.LoadAndRealise.time_realise((50, 50, 2), False, 'PP')                                  |
|          | 1.67±0.04ms                  | 1.71±0.07ms               |    1.02 | load.LoadAndRealise.time_realise((50, 50, 2), True, 'FF')                                   |
|          | 2.94±0.09ms                  | 2.97±0.08ms               |    1.01 | load.LoadAndRealise.time_realise((50, 50, 2), True, 'NetCDF')                               |
|          | 1.69±0.04ms                  | 1.72±0.07ms               |    1.02 | load.LoadAndRealise.time_realise((50, 50, 2), True, 'PP')                                   |
|          | 358±2ms                      | 364±1ms                   |    1.02 | load.ManyVars.time_many_var_load                                                            |
|          | 10.1±0.1ms                   | 10.0±0.1ms                |    0.99 | load.STASHConstraint.time_stash_constraint((1280, 960, 5), 'FF')                            |
|          | 10.1±0.02ms                  | 10.4±0.1ms                |    1.03 | load.STASHConstraint.time_stash_constraint((1280, 960, 5), 'PP')                            |
|          | 1.57±0.01s                   | 1.59±0.02s                |    1.02 | load.STASHConstraint.time_stash_constraint((2, 2, 1000), 'FF')                              |
|          | 1.60±0.02s                   | 1.61±0.01s                |    1.01 | load.STASHConstraint.time_stash_constraint((2, 2, 1000), 'PP')                              |
|          | 5.13±0.02ms                  | 5.20±0.04ms               |    1.01 | load.STASHConstraint.time_stash_constraint((2, 2, 2), 'FF')                                 |
|          | 5.14±0.05ms                  | 5.20±0.05ms               |    1.01 | load.STASHConstraint.time_stash_constraint((2, 2, 2), 'PP')                                 |
|          | 9.13±0.2ms                   | 9.35±0.07ms               |    1.02 | load.StructuredFF.time_structured_load((1280, 960, 5), False)                               |
|          | 5.87±0.08ms                  | 6.03±0.07ms               |    1.03 | load.StructuredFF.time_structured_load((1280, 960, 5), True)                                |
|          | 1.55±0.01s                   | 1.57±0.01s                |    1.01 | load.StructuredFF.time_structured_load((2, 2, 1000), False)                                 |
|          | 523±4ms                      | 554±5ms                   |    1.06 | load.StructuredFF.time_structured_load((2, 2, 1000), True)                                  |
|          | 4.31±0.04ms                  | 4.38±0.03ms               |    1.02 | load.StructuredFF.time_structured_load((2, 2, 2), False)                                    |
|          | 4.18±0.04ms                  | 4.24±0.02ms               |    1.01 | load.StructuredFF.time_structured_load((2, 2, 2), True)                                     |
|          | 169±2ms                      | 172±3ms                   |    1.02 | load.TimeConstraint.time_time_constraint(20, 'FF')                                          |
|          | 24.2±0.2ms                   | 24.5±0.3ms                |    1.01 | load.TimeConstraint.time_time_constraint(20, 'NetCDF')                                      |
|          | 169±0.4ms                    | 172±5ms                   |    1.02 | load.TimeConstraint.time_time_constraint(20, 'PP')                                          |
|          | 32.9±0.3ms                   | 33.8±0.4ms                |    1.03 | load.TimeConstraint.time_time_constraint(3, 'FF')                                           |
|          | 23.5±0.2ms                   | 24.0±0.2ms                |    1.02 | load.TimeConstraint.time_time_constraint(3, 'NetCDF')                                       |
|          | 33.3±0.07ms                  | 33.9±0.4ms                |    1.02 | load.TimeConstraint.time_time_constraint(3, 'PP')                                           |
|          | 19.2±0.2ms                   | 19.3±0.2ms                |    1.01 | load.ugrid.BasicLoading.time_load_file(1)                                                   |
|          | 53.5±0.6ms                   | 55.5±1ms                  |    1.04 | load.ugrid.BasicLoading.time_load_file(200000)                                              |
|          | 14.4±0.07ms                  | 14.9±0.2ms                |    1.03 | load.ugrid.BasicLoading.time_load_mesh(1)                                                   |
|          | 24.6±0.3ms                   | 24.7±0.7ms                |    1.01 | load.ugrid.BasicLoading.time_load_mesh(200000)                                              |
|          | 19.0±0.2ms                   | 19.7±0.2ms                |    1.04 | load.ugrid.BasicLoadingTime.time_load_file(1)                                               |
|          | 23.3±0.2ms                   | 23.7±0.3ms                |    1.02 | load.ugrid.BasicLoadingTime.time_load_file(200000)                                          |
|          | 14.4±0.1ms                   | 14.6±0.09ms               |    1.01 | load.ugrid.BasicLoadingTime.time_load_mesh(1)                                               |
|          | 18.9±0.2ms                   | 18.9±0.3ms                |    1    | load.ugrid.BasicLoadingTime.time_load_mesh(200000)                                          |
|          | 19.9±0.2ms                   | 20.6±0.5ms                |    1.04 | load.ugrid.Callback.time_load_file_callback(1)                                              |
|          | 64.9±1ms                     | 66.8±1ms                  |    1.03 | load.ugrid.Callback.time_load_file_callback(200000)                                         |
|          | 20.3±0.3ms                   | 20.2±0.3ms                |    0.99 | load.ugrid.CallbackTime.time_load_file_callback(1)                                          |
|          | 24.8±0.1ms                   | 25.2±0.4ms                |    1.02 | load.ugrid.CallbackTime.time_load_file_callback(200000)                                     |
|          | 2.71±0.08ms                  | 2.78±0.09ms               |    1.03 | load.ugrid.DataRealisation.time_realise_data(10000)                                         |
|          | 4.71±0.09ms                  | 3.95±0.3ms                |    0.84 | load.ugrid.DataRealisation.time_realise_data(200000)                                        |
|          | 34.6±0.9ms                   | 34.2±1ms                  |    0.99 | load.ugrid.DataRealisationTime.time_realise_data(10000)                                     |
|          | 774±4ms                      | 766±9ms                   |    0.99 | load.ugrid.DataRealisationTime.time_realise_data(200000)                                    |
|          | 421±4ms                      | 445±4ms                   |    1.06 | merge_concat.Concatenate.time_concatenate(False)                                            |
|          | 424±4ms                      | 445±6ms                   |    1.05 | merge_concat.Concatenate.time_concatenate(True)                                             |
|          | 109±0.3M                     | 109±0.1M                  |    1    | merge_concat.Concatenate.tracemalloc_concatenate(False)                                     |
|          | 109±0.3M                     | 109±0.2M                  |    1    | merge_concat.Concatenate.tracemalloc_concatenate(True)                                      |
|          | 56.1±0.2ms                   | 55.3±0.6ms                |    0.98 | merge_concat.Merge.time_merge                                                               |
|          | 1.62±0.2M                    | 1.62±0.2M                 |    1    | merge_concat.Merge.tracemalloc_merge                                                        |
|          | 453±3ns                      | 405±5ns                   |    0.89 | mesh.utils.regions_combine.CombineRegionsComputeRealData.time_compute_data(50)              |
|          | 216±1ms                      | 212±1ms                   |    0.98 | mesh.utils.regions_combine.CombineRegionsComputeRealData.time_compute_data(500)             |
|          | 658±1k                       | 650±0.1k                  |    0.99 | mesh.utils.regions_combine.CombineRegionsComputeRealData.tracemalloc_compute_data(50)       |
|          | 60.1±0M                      | 60.1±0M                   |    1    | mesh.utils.regions_combine.CombineRegionsComputeRealData.tracemalloc_compute_data(500)      |
|          | 16.6±0.3ms                   | 17.5±0.3ms                |    1.05 | mesh.utils.regions_combine.CombineRegionsCreateCube.time_create_combined_cube(50)           |
|          | 18.9±0.5ms                   | 19.7±0.4ms                |    1.04 | mesh.utils.regions_combine.CombineRegionsCreateCube.time_create_combined_cube(500)          |
|          | 808±0.7k                     | 698±50k                   |    0.86 | mesh.utils.regions_combine.CombineRegionsCreateCube.tracemalloc_create_combined_cube(50)    |
|          | 12.7±0M                      | 12.6±0.05M                |    0.99 | mesh.utils.regions_combine.CombineRegionsCreateCube.tracemalloc_create_combined_cube(500)   |
|          | 116±0.8ms                    | 118±0.4ms                 |    1.01 | mesh.utils.regions_combine.CombineRegionsFileStreamedCalc.time_stream_file2file(50)         |
|          | 675±10ms                     | 659±9ms                   |    0.98 | mesh.utils.regions_combine.CombineRegionsFileStreamedCalc.time_stream_file2file(500)        |
|          | 1.21±0.01M                   | 1.23±0.02M                |    1.02 | mesh.utils.regions_combine.CombineRegionsFileStreamedCalc.tracemalloc_stream_file2file(50)  |
|          | 96.3±0.03M                   | 96.3±0.01M                |    1    | mesh.utils.regions_combine.CombineRegionsFileStreamedCalc.tracemalloc_stream_file2file(500) |
|          | 76.6±1ms                     | 76.1±2ms                  |    0.99 | mesh.utils.regions_combine.CombineRegionsSaveData.time_save(50)                             |
|          | 630±7ms                      | 624±4ms                   |    0.99 | mesh.utils.regions_combine.CombineRegionsSaveData.time_save(500)                            |
|          | 1.18±0.01M                   | 1.17±0.02M                |    0.99 | mesh.utils.regions_combine.CombineRegionsSaveData.tracemalloc_save(50)                      |
|          | 96.2±0.01M                   | 96.2±0.01M                |    1    | mesh.utils.regions_combine.CombineRegionsSaveData.tracemalloc_save(500)                     |
|          | 2.1752849999999997           | 2.1752849999999997        |    1    | mesh.utils.regions_combine.CombineRegionsSaveData.track_filesize_saved(50)                  |
|          | 216.01528499999998           | 216.01528499999998        |    1    | mesh.utils.regions_combine.CombineRegionsSaveData.track_filesize_saved(500)                 |
|          | 6.41±0.1ms                   | 6.51±0.02ms               |    1.01 | plot.AuxSort.time_aux_sort                                                                  |
|          | 68.7±5ms                     | 76.5±4ms                  |    1.11 | regridding.CurvilinearRegridding.time_regrid_pic                                            |
|          | 136±3M                       | 136±3M                    |    1    | regridding.CurvilinearRegridding.tracemalloc_regrid_pic                                     |
|          | 99.2±0.5ms                   | 98.6±0.8ms                |    0.99 | regridding.HorizontalChunkedRegridding.time_regrid_area_w                                   |
|          | 47.9±1ms                     | 49.8±0.8ms                |    1.04 | regridding.HorizontalChunkedRegridding.time_regrid_area_w_new_grid                          |
|          | 106±0.04M                    | 106±0.05M                 |    1    | regridding.HorizontalChunkedRegridding.tracemalloc_regrid_area_w                            |
|          | 147±0.02M                    | 147±0.02M                 |    1    | regridding.HorizontalChunkedRegridding.tracemalloc_regrid_area_w_new_grid                   |
|          | 4.47±0.01ms                  | 4.53±0.03ms               |    1.01 | save.NetcdfSave.time_netcdf_save_cube(50, False)                                            |
|          | 79.7±0.8ms                   | 80.2±1ms                  |    1.01 | save.NetcdfSave.time_netcdf_save_cube(50, True)                                             |
|          | 51.7±0.7ms                   | 51.8±1ms                  |    1    | save.NetcdfSave.time_netcdf_save_cube(600, False)                                           |
|          | 577±4ms                      | 583±3ms                   |    1.01 | save.NetcdfSave.time_netcdf_save_cube(600, True)                                            |
|          | 90.3±0.9ns                   | 86.5±0.5ns                |    0.96 | save.NetcdfSave.time_netcdf_save_mesh(50, False)                                            |
|          | 62.2±0.4ms                   | 61.6±0.8ms                |    0.99 | save.NetcdfSave.time_netcdf_save_mesh(50, True)                                             |
|          | 87.9±0.8ns                   | 87.3±0.7ns                |    0.99 | save.NetcdfSave.time_netcdf_save_mesh(600, False)                                           |
|          | 507±3ms                      | 513±2ms                   |    1.01 | save.NetcdfSave.time_netcdf_save_mesh(600, True)                                            |
|          | 28.9±0.06k                   | 30.1±0.07k                |    1.04 | save.NetcdfSave.tracemalloc_netcdf_save(50, False)                                          |
|          | 1.77±0.2M                    | 1.68±0.1M                 |    0.95 | save.NetcdfSave.tracemalloc_netcdf_save(50, True)                                           |
|          | 28.9±0.05k                   | 30.1±0.08k                |    1.04 | save.NetcdfSave.tracemalloc_netcdf_save(600, False)                                         |
|          | 225±20M                      | 191±20M                   |    0.85 | save.NetcdfSave.tracemalloc_netcdf_save(600, True)                                          |
|          | 41.7±0.4ms                   | 40.7±0.6ms                |    0.98 | stats.PearsonR.time_lazy                                                                    |
|          | 8.86±0.1ms                   | 8.91±0.2ms                |    1.01 | stats.PearsonR.time_real                                                                    |
|          | 24.9±0.3M                    | 24.2±1M                   |    0.97 | stats.PearsonR.tracemalloc_lazy                                                             |
|          | 18.4±0.01M                   | 18.4±0.01M                |    1    | stats.PearsonR.tracemalloc_real                                                             |
|          | 22.7±0.4ms                   | 26.4±0.9ms                |    1.16 | trajectory.TrajectoryInterpolation.time_trajectory_linear                                   |
|          | 59.1±0.5ms                   | 70.1±0.6ms                |    1.19 | trajectory.TrajectoryInterpolation.time_trajectory_nearest                                  |
|          | 23.3±0.01M                   | 23.3±0.01M                |    1    | trajectory.TrajectoryInterpolation.tracemalloc_trajectory_linear                            |
|          | 12.1±0.04M                   | 12.1±0.04M                |    1    | trajectory.TrajectoryInterpolation.tracemalloc_trajectory_nearest                           |

Benchmarks that have got worse:

| Change   | Before [df4c52b6] <main~1>   | After [d135ebb9] <main>   |   Ratio | Benchmark (Parameter)                                         |
|----------|------------------------------|---------------------------|---------|---------------------------------------------------------------|
| +        | 26.0±3ms                     | 38.5±3ms                  |    1.48 | load.LoadAndRealise.time_realise((1280, 960, 5), False, 'FF') |

Generated by GHA run 12402780526

[pp-mo]

Disappointing but presumably a consequence of #6251 which we eventually overcome