spacing too low and missing on some stroke methods causes lag

dots , anchored and drag dots are missing spacing feature what i think its causing the lag is that the spacing is set to a low value and you cant adjust it since its not visible.

Also did a test with other strokes that have spacing if i set to 0% and sculpt its lagging

It's noticable on my system RX480 , Ryzen 1600 2.79 blender