thks, I'm using a nyquist value, just used half of the Mode's period.
using sleep with 2.5ms instead 5ms i've got some faster readings.

```
Cont200Hz               time:   [4.9608 ms 4.9858 ms 5.0131 ms]
                        change: [-29.224% -28.432% -27.589%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 2 outliers among 100 measurements (2.00%)
  1 (1.00%) high mild
  1 (1.00%) high severe
```