Comment 65 for bug 677551

For a 140kb textarea (the testcase in comment 0), inserting or deleting a line takes about a second or two for me, on a laptop that was brand-new-and-fast in July.

The behavior is quadratic, so doing it on something like http://en.wikipedia.org/w/index.php?title=Economy_of_Poland&action=edit (22KB of text) is a bit faster but still noticeably laggy. Doint it on something like http://en.wikipedia.org/w/index.php?title=Seven_Years%27_War&action=edit (55KB) is definitely laggy; 500ms at least.

The really long wikipedia articles seem to be locked down so I can't edit them. ;)

As for why no one has reported this... my best guess is that people generally assume that our editing performance is sucky and so think this is normal. :(