Message-ID: <423167AC.5060900 at wanadoo.fr>
Disposition-Notification-To: Arnold <arnold.guillaumot at wanadoo.fr>
Date: Fri, 11 Mar 2005 17:41:00 +0800
From: Arnold <arnold.guillaumot at wanadoo.fr>
MIME-Version: 1.0
To: Richard Jones <rich at annexia.org>
CC: lablgtk at math.nagoya-u.ac.jp
Subject: Re: Inserting rows into GTree.tree_store is slow
References: <20050311003216.GA31634 at furbychan.cocan.org>
In-Reply-To: <20050311003216.GA31634 at furbychan.cocan.org>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit

Richard Jones wrote:

> I have a program which loads a file and inserts around 25,000 rows
> into a GTree.tree_store model. This process takes about 10 minutes.
> I had initially blamed the (OCaml-based) loading and parsing code, but
> now that I come to analyse it, it turns out that the OCaml code is
> almost instantaneous (no suprise there!) but inserting the rows into
> the GTree.tree_store is what is taking all the time.
>
> I'm wondering if there is a particular reason for this. Is it just
> that the underlying C model is slow, or could it be the OCaml
> bindings? Are there good ways to "bulk insert" lots of rows into a
> tree_store?
>
> Rich.
>
Inserting a lot of rows is quite slow if a #GTree.model is "attached" to 
a GTree.View.
You have first to call the method view#unset_model () from your GTree.view.
Then once heavy operations are finished call the view#set_model model to 
display your data.
You can also refer to the the tutorial written by Tim-Philipp Muller.
http://scentric.net/tutorial/sec-treemodel-add-rows.html#sec-treestore-adding-many-rows
I hope it helps you.