(In reply to comment #61) > How big is "big" and how slow is "slow"?
Try Jonas's testcase in comment 0. It's just 4000 lines -- not impossibly large for an e-mail thread -- and inserting a newline takes about 5s on my machine.
(In reply to comment #61)
> How big is "big" and how slow is "slow"?
Try Jonas's testcase in comment 0. It's just 4000 lines -- not impossibly large for an e-mail thread -- and inserting a newline takes about 5s on my machine.