Is autoPan frame-rate dependent (px/frame) or time-based (px/sec)?

[ap32]

I inspected autoPan and calcAutoPan. autoPan repeatedly calls requestAnimationFrame(autoPan) but doesn't use the RAF timestamp, and calcAutoPan returns velocity * speed (default 15). That looks like the movement may be applied as pixels per frame rather than scaled by elapsed time.

Is autoPanSpeed intended to be interpreted as px/frame or px/sec? If it's px/frame, that could make autopan speed vary across different monitor refresh rates.