In the good old days, repeated emacs keyboard macros ran without repainting the display until the end. Over the years this changed, and now it appears that the display is redrawn 100% of the time -- which is a bit tedious when I try to run a macro a few million times on a large buffer.
Is there a way to inhibit redraw until all of the repeats are done?
EDIT: Turns out that it can't figure out a reproducer, even though I've seen it a bunch of times. When I do I'll report it as a bug.