
reading times: dd bs=1536 count=1000000

rgb: first way (21.72)
  0.900u 20.840s 0:21.85 99.4%    0+0k 0+0io 85pf+0w   21.7189
  0.840u 20.900s 0:21.85 99.4%    0+0k 0+0io 85pf+0w   21.7189
  0.840u 20.900s 0:21.83 99.5%    0+0k 0+0io 85pf+0w   21.7208

rgb: second way (20.74)
  0.830u 19.930s 0:20.83 99.6%    0+0k 0+0io 85pf+0w   20.7466
  0.760u 19.990s 0:20.86 99.4%    0+0k 0+0io 85pf+0w   20.7348
  0.810u 19.950s 0:20.85 99.5%    0+0k 0+0io 85pf+0w   20.7457

bgr  (10.14)
  0.830u 9.320s 0:10.22 99.3%     0+0k 0+0io 85pf+0w   10.1484
  0.750u 9.400s 0:10.26 98.9%     0+0k 0+0io 85pf+0w   10.1471
  0.950u 9.190s 0:10.23 99.1%     0+0k 0+0io 85pf+0w   10.1379

  0.730u 9.410s 0:10.26 98.8%     0+0k 0+0io 85pf+0w   10.1368
  0.810u 9.340s 0:10.25 99.0%     0+0k 0+0io 85pf+0w   10.1475
  0.940u 9.210s 0:10.24 99.1%     0+0k 0+0io 85pf+0w   10.1478
