Even when I delete a large mesh from lightwave and it's accociated textures, there's a big delay there as well.

Thing is, we are adding or removing BIG files, and in some cases a LOT of them.

I imagine you could turn the undo options down to zilch, and go back to privious deletion speed, but we've all be wanting multiple undo/pedo for so many years I suspect few will want to kill the feature off in faovr of speed increases.

it's already saved my @$$ a number of times already.

Way too many people take way too many things way too seriously.