"When working with extremely long marathon maps, long marathon maps undo/redo support can come at a performance cost. Use this option in extreme conditions."Shirayuki wrote:
This is from Undo History if I remember correctly, hence the "Disable Undo" in the option. But still, having to quit editor every now and then, or even having to restart osu! when mapping isn't fun T_T
If this is the case; the problem here is that it's not just on long maps/marathon maps (though it's definitely worse on those). A particularly dense, streamy map, or one with many green lines can do this too - or even just general hitsounding as BD showed. I was mapping a two minute long song and had it happen. So there's definitely something up here.