Re: [vile] visual-matches

[Wayne Cuddy]

Understood. However for this command 'g/pattern/d', vile takes an
incredibly long time with visual-matches enabled. If I set it to none,
but leave syntax highlighting enabled (which I think I may have set to
.5 or .75 seconds) it's a huge improvement.

What I'm asking is each time a line is removed, using the above
command, does vile rescan the entire for for visual matches? Or does
it do this after removing all the lines?

So what I end up doing is disabling visual matches, using the global
command to remove lines, and then re-enable visual-matches.

If I use a command such as '%s' to replace some text it's much faster
than the global command which removes lines.

None of this is really an issue, just curious behavior.

Wayne

On Fri, Oct 11, 2013 at 05:41:40PM -0400, Thomas Dickey wrote:
> On Fri, Oct 11, 2013 at 04:50:09PM -0400, Wayne Cuddy wrote:
> > I have a file that is only about 30k lines. The command 'g/pattern/d'
> > takes a very long time when visual-matches is enabled and is almost
> > instant when set to 'none'. I'm curious to what would cause this? Is the
> > match highlighter being executed after each line is remove when visual
> > matching is enabled? Is there a way to have the g/v and other commands
> 
> yes - it is inefficient.  Essentially
> 
>       a) when the search command is issued, vile scans the whole file,
>          computing the highlighting as a linked list
>          (think of it as a transparent overlay).
> 
>       b) as it displays a page, vile looks in the list for chunks that
>          fall on the page.
> 
>       c) doing an edit or other change that requires repainting the screen
>          adds the overlay as in (c)
> 
> The same issue exists with syntax highlighting, though solving this one
> seems less complicated.  (On the other hand, syntax highlighting
> can be turned with the autocolor setting - that doesn't apply to
> visual matches). 
> 
> > that modify text save, disable and re-enable visual matches so
> > that I don't have to remember to do it?
> > 
> > Thanks,
> > Wayne
> > 
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> 
> -- 
> Thomas E. Dickey <address@hidden>
> http://invisible-island.net
> ftp://invisible-island.net



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