Compass example repeatedly initialises IMU

[tomoinn]

In the compass example, there's a call within the loop to sense.get_compass(), which performs IMU setup. This is probably not a good idea, one of the effects is a huge lag in responding to changes in orientation (because you're not reading nearly fast enough from the underlying IMU FIFO). Better to do sense.get_compass() outside the loop, then use raw magnetometer readings and a bit of geometry to calculate bearing within the loop.

[rzr]

and other option is to just use orientation['yaw']