Need Clarification on Kalista's Passive
If Kalista enters a movement command while winding her basic attack or right after using Pierce, she dashes a short distance in the target direction, scaling with her boots tier. While dashing, her basic attack wind-up is only reduced by 0.66% per 1% bonus attack speed compared to the standard 1 per 1.
Is this saying that, while dashing, her attack speed is effectively increased or effectively decreased?