Re: [Nautilus-list] [PATCH]: avoid re-layouting when it's not needed.

[Darin Adler <darin bentspoon com>]

On Sunday, June 17, 2001, at 03:01  PM, Yoann Vandoorselaere wrote:

> I observed that when loading a directory, we are losting time in doing
> re-layouting even *before* any file get added.
>
> The reason is the emission of the files_changed signal which trigger
> display functions...

I have some ideas about how to solve this that we can pursue when I get 
back from my trip.

There is another big problem, where files_changed signal is emitted for 
all files whenever you start monitoring in a new window. That one can 
easily be fixed by adding a callback so that the new window learns about 
the files in its own callback and doesn't disturb existing windows by 
sending out a signal.

The problem where laying out files before they are first officially added 
happens may be solvable another way -- but I need to think about it more.

There's also opportunity to do less work on files_changed when the files 
in question haven't really changed.

Finally, there's no reason to have separate files_added and files_changed 
signals any more, and I think I'll get rid of files_added next time I make 
changes to this code.

But it's a complicated topic, and I don't have any immediate ideas that 
are trivial to implement. Just doing away with the whole change notice 
machinery is the wrong direction. That is there for a good reason, and 
disconnecting it after the initial directory load is wrong.

    -- Darin