Okay...one thing you want to keep in mind is that you should call the
treeview's BeginUpdate and EndUpdate methods at the point(s) where you
load the data into the treeview. This isn't such a big deal (I don't
think) when you're using the AddRange() method but if you're adding the
tree's items individually, then you'll definitely want to use these
methods to disable repainting of the treeview prior to the update and
then re-enable painting of the treeview after the update.

So you'll have something like...

/******************************************/
myTreeView.BeginUpdate();
// create and populate the tree view based on individual
//    items in a collection...
foreach(BeerCan obj in Fridge)
{
myTreeView.Nodes.Add(new TreeNode("Beer Name: " + obj.Name));
}
myTreeView.EndUpdate();
/******************************************/

Other than that, you may just want to make sure that your other code is
optimized (which you already said you want to check on).
Good luck!