I had a chance to test performance of smooth scrolling during a longer drive. Turns out, its a major cpu consumer leading to two CPUs running instead of one, with usage at all frequencies increased. I will probably have to improve the algorithm or adjust animation settings to reduce this effect. For now, I recommend to disable this option if your phone is getting hot, unless you are showing off either Pure Maps to casual observer or your phone as a heating device.

Corresponding issue: https://github.com/rinigus/pure-maps/issues/311

Graph below