getChan commented on PR #15948:
URL: https://github.com/apache/datafusion/pull/15948#issuecomment-2853659402

   I just add benchmarks for SMJExec spill read execution.
   maybe since it is not limited to the read spill scope, the diff is small.
   ```
   sort_merge_join_spill/SortMergeJoinExec_spill
                           time:   [321.88 µs 325.75 µs 330.51 µs]
                           change: [-2.8665% -1.3757% +0.1785%] (p = 0.09 > 
0.05)
                           No change in performance detected.
   Found 2 outliers among 100 measurements (2.00%)
     1 (1.00%) high mild
     1 (1.00%) high severe
   ```


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