@Morten-Nissov ,
About the IMU dt, sorry, i got it backwards, the dt is 0.976ms, so that would be slightly above 1khz. So we are on the same page.
Yes, reducing the FIFO size results in more SPI read transactions, which means that the CPU / Kernel has to do more work. There is a per transaction overhead that is much more significant than just getting more data per single transaction.
Let's not bother with the PR because it is a 2-character change 🙂 . I will get to it and test it soon.
Alex