Baunsgaard commented on PR #16740:
URL: https://github.com/apache/iceberg/pull/16740#issuecomment-4669576269

   Small update on the times:
   
   Core-job wall time, **before** = baseline main run, **after** = mean of 3 
green
   PR runs (per Spark version, averaged across the JVM x Scala matrix to smooth
   runner noise):
   
   | Spark core jobs | Before | After (mean of 3 runs) | Δ |
   |---|---:|---:|---:|
   | 3.5 | 40.6 min | 37.5 min | −7.6% |
   | 4.0 | 47.3 min | 42.9 min | −9.3% |
   | 4.1 | 42.9 min | 39.1 min | −8.9% |
   | **Average** | **42.8 min** | **39.2 min** | **−8.4%** |
   
   The per-run overall core average is stable across the three runs (39.4 / 
39.3 /
   38.9 min), so the ~8% improvement is consistent rather than a single lucky 
run.
   


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