thank you computer for reading my mind and putting in the title for me.
Anyways, what I was going to say was that I changed how the
doOneCycle function in the
WorldMorph works to show what the areas to be redrawn (internally called "broken") are by stroking rects on the world canvas after everything has been drawn.
And here's a video of me testing this on Snap!
And I gotta say, scrolling in the block palette. THAT'S A LOT OF RECTS
That's why projects in Snap! slow down when you scroll in the palette or scroll anywhere with blocks. Because the world is redrawing that area!
If you actually want to test this for yourself go here.
Developers, you can toggle this on and off in the World menu.