Re: GtkTreeView very slow for large lists

[John Lindgren <john lindgren aol com>]

On 12/16/2011 05:54 AM, jcupitt gmail com wrote:
> ...
>
> I did notice that you forgot to put the treeview into fixed-height mode.
>
> Normally, treeview lets rows vary in height (so you can change font
> between rows, for example). To make this work, treeview has a idle
> task which scans the entire model after it's been realized and
> calculates a total height for the view, updating an initial guess.
> This is the thing that's causing your terrible performance problems.
>
> On my elderly desktop I see your test window almost immediately, but
> it takes 50s for the CPU to drop to zero as it requests the height of
> every row. If i add this line after creating the columns:
>
>     gtk_tree_view_set_fixed_height_mode (GTK_TREE_VIEW (list), TRUE);
>
> The window appears instantly and there is no background CPU churn.
>
> John

Aha!  Thank you, that is what I was missing.  Problem solved.

-- John