Re: [Mono-winforms-list] Very slow performance in WinForms ListView
I'm extensively using ListView (several forms with different listviews with thousands of items each) with Mono 2.4 under Fedora 11 Beta, openSUSE 11.1 and Mono SVN on Ubuntu 9.04 RC. Performance if very good and loading a listview with 5000 items will always take less than a second, even on an old Athlon XP. Did you get good performance by using BeginUpdate() and EndUpdate() calls on the listview or even without them? -Jyoti ___ Mono-winforms-list maillist - Mono-winforms-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-winforms-list ___ Mono-winforms-list maillist - Mono-winforms-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-winforms-list
Re: [Mono-winforms-list] Very slow performance in WinForms ListView
Thanks for the tip. This helped my list view performance.
-Jyoti
From: Ernesto [mailto:equista...@gmail.com]
Sent: Wednesday, April 22, 2009 11:53 AM
To: Kolhe, Jyoti B
Cc: mono-winforms-list@lists.ximian.com
Subject: Re: [Mono-winforms-list] Very slow performance in WinForms ListView
Le 22/04/2009 14:33, Kolhe, Jyoti B a écrit :
I'm extensively using ListView (several forms with different listviews
with thousands of items each) with Mono 2.4 under Fedora 11 Beta,
openSUSE 11.1 and Mono SVN on Ubuntu 9.04 RC. Performance if very good
and loading a listview with 5000 items will always take less than a
second, even on an old Athlon XP.
Did you get good performance by using BeginUpdate() and EndUpdate() calls on
the listview or even without them?
I always use BeginUpdate and EndUpdate. Usually, I also use the form's
SuspendLayout() and ResumeLayout() methods, like this:
pre
this.SuspendLayout();
MyListView.BeginUpdate();
MyListView.Items.Clear();
for(;;) {
ListViewItem Itm = MyListView.Items.Add(blah blah);
Itm.SubItems.Add(blah blah);
Itm.SubItems.Add(blah blah);
Itm.SubItems.Add(blah blah);
}
MyListView.EndUpdate();
this.ResumeLayout();
/pre
this beign the container form.
Hope it helps.
Regards,
Ernesto
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Re: [Mono-winforms-list] Very slow performance in WinForms ListView
Le 22/04/2009 14:33, Kolhe, Jyoti B a écrit :
I'm extensively using ListView (several forms with different listviews
with thousands of items each) with Mono 2.4 under Fedora 11 Beta,
openSUSE 11.1 and Mono SVN on Ubuntu 9.04 RC. Performance if very good
and loading a listview with 5000 items will always take less than a
second, even on an old Athlon XP.
Did you get good performance by using BeginUpdate() and EndUpdate() calls on
the listview or even without them?
I always use BeginUpdate and EndUpdate. Usually, I also use the form's
SuspendLayout() and ResumeLayout() methods, like this:
pre
this.SuspendLayout();
MyListView.BeginUpdate();
MyListView.Items.Clear();
for(;;) {
ListViewItem Itm = MyListView.Items.Add(blah blah);
Itm.SubItems.Add(blah blah);
Itm.SubItems.Add(blah blah);
Itm.SubItems.Add(blah blah);
}
MyListView.EndUpdate();
this.ResumeLayout();
/pre
this beign the container form.
Hope it helps.
Regards,
Ernesto
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Re: [Mono-winforms-list] Very slow performance in WinForms ListView
Using BeginUpdate() and EndUpdate() worked well for adding items. But, I still see very slow listview refresh when a column is resized. Do I need to capture these events and add above function calls in the event handler? Basically, the problem is that refresh of listview is very slow. Is there any solution that will fix the list view performance universally(column reszing, scrolling, coming out of screensaver etc.) and not just when I add items. Thanks. -- View this message in context: http://www.nabble.com/Very-slow-performance-in-WinForms-ListView-tp20725159p23162133.html Sent from the Mono - WinForms mailing list archive at Nabble.com. ___ Mono-winforms-list maillist - Mono-winforms-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-winforms-list
Re: [Mono-winforms-list] Very slow performance in WinForms ListView
I commited some changes some weeks ago (not available in 2.4, but they will be ready for 2.6) that improve the rendering, with less flicker changing columns width/position. But anyway, would you mind filling a bug report with a test case? There are different things that can affect the performance of the ListView, and unfortunately we don't have an universally way to make fast the ListView (such ListView.SuperFast = true). If we have a specific usage scenario, we can try to improve the performance - specially when other users have notified of the bad performance and we have tuned the performance in the past. Carlos. 2009/4/21 jyoti_C# jyoti.b.ko...@intel.com Using BeginUpdate() and EndUpdate() worked well for adding items. But, I still see very slow listview refresh when a column is resized. Do I need to capture these events and add above function calls in the event handler? Basically, the problem is that refresh of listview is very slow. Is there any solution that will fix the list view performance universally(column reszing, scrolling, coming out of screensaver etc.) and not just when I add items. Thanks. -- View this message in context: http://www.nabble.com/Very-slow-performance-in-WinForms-ListView-tp20725159p23162133.html Sent from the Mono - WinForms mailing list archive at Nabble.com. ___ Mono-winforms-list maillist - Mono-winforms-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-winforms-list ___ Mono-winforms-list maillist - Mono-winforms-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-winforms-list
Re: [Mono-winforms-list] Very slow performance in WinForms ListView
El 27/11/2008 17:27, JvD escribió: Hello, I'm new to Mono. I have downloaded and installed Mono2 onto Ubuntu V8.04. After that I wrote a small Winforms program adding 100 lines to a listview, repeating that for 10 times. Running the program on WindowsXP, adding 100 lines takes between 15 and 30 msec each time. Running the same program on Ubuntu and Mono the first cycle takes 1,5 seconds and the last one even takes 15 seconds. Can somebody help me in fixing this problem since this performance is way to slow for my application. I'm extensively using ListView (several forms with different listviews with thousands of items each) with Mono 2.4 under Fedora 11 Beta, openSUSE 11.1 and Mono SVN on Ubuntu 9.04 RC. Performance if very good and loading a listview with 5000 items will always take less than a second, even on an old Athlon XP. Although, I can remember a recursion problem that affected the listview some time ago. I don't have access to the Mono source code right now but maybe you or someone else can take a look at the Listview changelog to see when was this recursion problem fixed. Anyway, I'm sure a more recent version of Mono will work. Here are some very straightforward instructions to install Mono 2.4 on Ubuntu: http://blog.ruski.co.za/page/Install-Mono-on-Ubuntu.aspx Regards, Ernesto ___ Mono-winforms-list maillist - Mono-winforms-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-winforms-list
Re: [Mono-winforms-list] Very slow performance in WinForms ListView
JvD wrote: Hello, I'm new to Mono. I have downloaded and installed Mono2 onto Ubuntu V8.04. After that I wrote a small Winforms program adding 100 lines to a listview, repeating that for 10 times. Running the program on WindowsXP, adding 100 lines takes between 15 and 30 msec each time. Running the same program on Ubuntu and Mono the first cycle takes 1,5 seconds and the last one even takes 15 seconds. Can somebody help me in fixing this problem since this performance is way to slow for my application. Hope to read something soon. JvD I am seeing a similar issue under mono/Linux. I am using Mono 2.4 verison. I have verified it by checking mono --version. I have C# test application which adds numbers from 0 to 999 to a listview when a button is clicked. On Windows/.NET this operation is very fast, whereas under Mono/Linux the listview update takes considerably long time. I can see each row being added. Is there any way to make listview update faster? Thanks, Jyoti -- View this message in context: http://www.nabble.com/Very-slow-performance-in-WinForms-ListView-tp20725159p23147493.html Sent from the Mono - WinForms mailing list archive at Nabble.com. ___ Mono-winforms-list maillist - Mono-winforms-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-winforms-list
Re: [Mono-winforms-list] Very slow performance in WinForms ListView
Is there any way to make listview update faster? Before you begin adding items, call ListView.BeginUpdate. When you are finished adding items, call ListView.EndUpdate. Jonathan ___ Mono-winforms-list maillist - Mono-winforms-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-winforms-list
Re: [Mono-winforms-list] Very slow performance in WinForms ListView
Hello, When testing on Windows, were you testing with the Microsoft .NET framework, or Mono? Anyway, if you find significant performance problems, then report a bug with all the details (http://mono-project.com/Bugs). There are a couple of ListView bugs already reported, but yours is apparently not known yet. -- View this message in context: http://www.nabble.com/Very-slow-performance-in-WinForms-ListView-tp20725159p20730525.html Sent from the Mono - WinForms mailing list archive at Nabble.com. ___ Mono-winforms-list maillist - Mono-winforms-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-winforms-list
Re: [Mono-winforms-list] Very slow performance in WinForms ListView
JvD a écrit : Hello, I'm new to Mono. I have downloaded and installed Mono2 onto Ubuntu V8.04. After that I wrote a small Winforms program adding 100 lines to a listview, repeating that for 10 times. Running the program on WindowsXP, adding 100 lines takes between 15 and 30 msec each time. Running the same program on Ubuntu and Mono the first cycle takes 1,5 seconds and the last one even takes 15 seconds. Can somebody help me in fixing this problem since this performance is way to slow for my application. How did you install Mono 2 on Ubuntu 8.04? Did you pulled it from Jaunty? Because as far as I know, the current Mono version on Ubuntu is 1.9.1, even if you installed the mono-2.0-devel package. Can you please confirm that you are running Mono versión 2.0.1 by doing mono --version on a console? I asking because this sound like a double-recursion bug present in older versions (up to 1.9.1_2, I think), but not on the current 2.0.1. I am extensively using ListViews with thousands of items and haven't had any speed issue since 2.0. Regards, Ernesto ___ Mono-winforms-list maillist - Mono-winforms-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-winforms-list
