Re: redisplay - very long lines

[Stefan Monnier]

>> > still need to walk to the end of a line before we are able to display
>> > it and all the lines after it.
>> 
>> In the above, when you say "line" do you mean "visual line" or "textual
>> line"?  IIUC we need to walk till the end of the visual line, but not
>> till the end of the textual line, so that shouldn't cause a slowdown
>> proportional to the length of the textual line.

> I thought we walked to the end of the textual line, but maybe I'm
> misremembering what redisplay does.

Indeed, the performance problems we're seeing seems to indicate that we
walkt to the end of the textual line, but I think we're here discussing
why that is.  Why not stop at the end of the last visual line
displayable in the window?


        Stefan