Comment 22 for bug 1951032

I ran the tests on a graviton2 instance and saw the improvement as expected/desired:

   length | before (MiB/s) | after (MiB/s) | delta
----------|----------------|----------------|----------
    32768 | 233.19 | 247.61 | 6.18%
    65536 | 443.44 | 468.68 | 5.69%
   131072 | 852.52 | 895.00 | 4.98%
   262144 | 1630.48 | 1704.48 | 4.54%
   524288 | 2480.18 | 2601.47 | 4.89%
  1048576 | 3900.73 | 4112.08 | 5.42%

I'll try to get some people to test some other arm64 systems before calling this verification-done though.