RE: Slow redisplay with long lines

[Stephan Mueller]

" > Long lines slow down redisplay because it needs to scan the entire
" > line to see how tall it will be on display.
"
" Why should it care about the whole line rather than only the part
" of it that's displayed?

So that the line height doesn't change when scrolling horizontally
and a taller character comes into view?

stephan();