benchmark report: on an 8GB Pi 5

[vielmetti]

Benchmark results of RUSTFLAGS="-C target-cpu=native" cargo bench --workspace run on a Pi 5. I compare with #4 and #40, these look to be respectable results but I don't know how to interpret the "high mild" / "high severe" results.

(Next task, hook up a radio and listen for planes)

01                      time:   [4.8451 ms 4.8691 ms 4.9032 ms]
Found 14 outliers among 100 measurements (14.00%)
  2 (2.00%) high mild
  12 (12.00%) high severe

02                      time:   [4.7251 ms 4.7318 ms 4.7404 ms]
Found 14 outliers among 100 measurements (14.00%)
  4 (4.00%) high mild
  10 (10.00%) high severe

03                      time:   [4.5843 ms 4.5912 ms 4.5996 ms]
Found 13 outliers among 100 measurements (13.00%)
  6 (6.00%) high mild
  7 (7.00%) high severe