> > Do you have syntax highlighting enabled?  If so, try turning it off
> > and see if that helps.  It can take vim a long time to highlight
> > files with long lines.

> Did not notice differences with syntax on/off. Both were equally slow.

I guess that cat-ing file, or viewing it in less is faster than vim,
isn't it ? That would probably mean that we use the terminal somehow
in-efficiently ? I haven't red the source code at all, but I would guess
that vim is re-drawing whole screen even if you shift down by one line.

Just out of curiosity, could you try opening file in less, and scroll
line by line down and up ? Is it also slow ?

-- 
        Vlad

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