Re: On ubuntu 8.04 it doesn't work well

[Bartolomeo Nicolotti <bnicolotti siapcn it>]

Il giorno gio, 01/01/2009 alle 22.56 +0100, Kai Willadsen ha scritto:
> 2008/12/30 Bartolomeo Nicolotti <bnicolotti siapcn it>:
> > I used meld on 7.10 for an year and it was great. Now I've upgraded to
> > 8.04 and the default version on it, i.e. 1.1.5.1, doesn't work well:
> >
> > 1) when I scroll the two files panels loose alignement
> 
> Could you be more specific? Does one bar scroll without the other
> scrolling, or what?
> 
> > 2) when comparing the two files attached by doing select-all, cut and
> > paste on a new meld window on the 7.10 it took 30seconds, with 8.04 more
> > than 5min and it seem to be in an endless loop.
> 
> In my experience, Meld's biggest speed problem comes from trying to
> highlight differences between lines on 'modified' (blue) chunks. The
> files you attached had one several thousand line long 'modified' chunk
> that Meld was choking trying to highlight.
> 
> In order to do the highlighting, Meld concatenates the lines in a
> modified chunk into one huge string and then asks for a diff on that
> sequence. For short sequences this usually produces excellent results.
> However, for long sequences it often produces poor results with lines
> 1 and 2 of the left-hand file matching up with sequences several
> hundred lines away on the right-hand side. Moreover, it's *slow*.
> 
> I've spent a little bit of time trying to come up with a better way of
> handling this, but it's just a *really hard* problem. One option is to
> simply shrug and give up if the modified sequences are too long, on
> the basis that it will take us forever to find similarities, and even
> when we find them they probably won't be that good.
> 
> I've attached a patch that does this (applies to head, not sure about
> 1.2.1). It's not a solution, but I think that Meld probably needs to
> have limit of this kind in place for worst-case situations like your
> files.
> 

The problem is with cut and paste, because if you open the files by
specifing their names it take some second

Bye!

> Hope that helps.
> 
> --
> Kai
-- 
Bartolomeo Nicolotti
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