westonpace commented on issue #10138:
URL: https://github.com/apache/arrow/issues/10138#issuecomment-828704017


   Indeed, the speedup is more linear on an SSD...
   ```
   [ read_1.0 ] speed (GB/s): mean = 0.3630993232511599, std = 
0.05952451935546521, n = 10; total time_elapse: 2.9084372880015508
   [ read_0.8 ] speed (GB/s): mean = 0.36376093584884195, std = 
0.008990062151343865, n = 10; total time_elapse: 2.213474280999435
   [ read_0.6 ] speed (GB/s): mean = 0.35984781969486807, std = 
0.004778046558776139, n = 10; total time_elapse: 1.6773865380018833
   [ read_0.4 ] speed (GB/s): mean = 0.3290578456574669, std = 
0.07105464075317411, n = 10; total time_elapse: 1.3731986839993624
   [ read_0.2 ] speed (GB/s): mean = 0.2799392331920786, std = 
0.07746319562812805, n = 10; total time_elapse: 0.8508833189998768
   ```


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