Comment 31 for bug 677551

(In reply to comment #26)
> So it looks like we clear all the textruns for the textarea from the
> CharacterDataChanged notification, then reflow all the lines, and before
> reflowing each line we clear its textrun, which is non-null at that point. So
> presumably we're constructing all those textruns twice... That still doesn't
> quite explain the behavior I see, where the difference is a lot more than 2x
> between paste and hitting enter.

Why is the textrun non-null when reflowing? We've already cleared them all, right?

Also, from what I read in this comment, it seems to me that we don't need to clear the textruns at all in CharacterDataChanged. But that breaks us horribly (having tried that). Is there something missing in this picture?