Edge impulse suggestions for compile options? (ARM targets)

Hello, does Edge Impulse have suggestions what compile options to use for ARM targets edge-impulse-sdk and tflite-model folder files?

I know it is quite hardware and use-case specific thing (Os optimizes for space and O2 speeds up), but I would appreciate some experienced tips and general guidelines for typical cases
A. best inference speed
B. best space savings

For example for the best speed: are these CMSIS DSP suggestions perfect for edge impulse model folder, or is there more speed gains to be had with some additional flags?
ARM-software/CMSIS-DSP: CMSIS-DSP embedded compute library for Cortex-M and Cortex-A

-O3 -ffast-math

Thank you!