tadeja commented on PR #49189:
URL: https://github.com/apache/arrow/pull/49189#issuecomment-3874689994

   @kou speeding up jobs would be best, indeed!
   
   I've been checking Build and why `ccache` almost never retrieves for macOS 
15-intel - as it gets evicted due to the [10 GB repo-wide cache 
limit.](https://docs.github.com/en/actions/reference/workflows-and-actions/dependency-caching#usage-limits-and-eviction-policy)
   `Cache not found for input keys: python-ccache-macos-15-intel-`
   
   I see [just around 7 successful completions in 
February](https://github.com/apache/arrow/actions/workflows/python.yml)
   [example A 
](https://github.com/apache/arrow/actions/runs/21741692681/job/62809010441#step:8:47)
 and [example B with 
ccache](https://github.com/apache/arrow/actions/runs/21781218926/job/62845471494#step:8:54)
 
   
   (Perhaps using `sccache` for macOS could be an option?)
   
   I will check Test phase and profiling options next. For now I've added 
["--durations=20 -v" on 
pytest](https://github.com/apache/arrow/actions/runs/21845968406/job/63041765523?pr=49189#step:10:5092)
   
   Locally on M1 I get pytest finished in 86.44s (0:01:26) and the following 
test duration for comparison:
   ```
   =========================================== slowest 20 durations 
============================================
   5.91s call     tests/test_fs.py::test_s3_options[builtin_pickle]
   5.90s call     tests/test_fs.py::test_s3_options[cloudpickle]
   4.67s call     tests/test_cython.py::test_cython_api
   3.80s call     tests/test_extension_type.py::test_cpp_extension_in_python
   3.76s call     tests/test_cython.py::test_visit_strings
   2.95s call     tests/test_dataset.py::test_write_dataset_with_backpressure
   1.66s call     tests/test_csv.py::TestThreadedCSVTableRead::test_cancellation
   1.47s call     tests/test_fs.py::test_s3_real_aws_region_selection
   1.08s call     tests/test_io.py::test_compression_level[zstd]
   1.06s call     tests/test_csv.py::TestSerialCSVTableRead::test_cancellation
   1.02s call     tests/test_pandas.py::test_is_data_frame_race_condition
   0.97s call     tests/test_fs.py::test_s3_finalize
   0.66s call     tests/parquet/test_metadata.py::test_table_large_metadata
   0.64s call     
tests/test_pandas.py::TestConvertMisc::test_threaded_conversion_multiprocess
   0.60s call     tests/test_fs.py::test_s3fs_wrong_region
   0.60s call     tests/test_fs.py::test_s3_finalize_region_resolver
   0.58s call     tests/test_fs.py::test_concurrent_s3fs_init
   0.50s call     tests/test_fs.py::test_s3_real_aws
   0.48s call     tests/test_ipc.py::test_read_year_month_nano_interval
   0.46s call     tests/test_pandas.py::test_threaded_pandas_import
   ```


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