Line-at-a-time, default layers
  100.0 MB in 12.012 sec, 8.3 MB/sec

Line-at-a-time, :raw:perlio
  100.0 MB in 1.837 sec, 54.4 MB/sec

Line-at-a-time, :raw:perlio:utf8
  100.0 MB in 2.021 sec, 49.5 MB/sec

Line-at-a-time, :win32:perlio
  100.0 MB in 1.805 sec, 55.4 MB/sec

Slurp-into-scalar, default layers
  100.0 MB in 0.182 sec, 550.1 MB/sec

Slurp-into-scalar, :raw:perlio
  100.0 MB in 0.065 sec, 1548.0 MB/sec

Slurp-into-scalar, :raw:perlio:utf8
  100000000 on disk, 99999476 in memory
  100.0 MB in 0.129 sec, 778.1 MB/sec

Slurp into scalar with sysopen/sysread (single read)
  100.0 MB in 0.034 sec, 2976.2 MB/sec