[Opensim-dev] RFC: Changing default script engine to xengine

[Kyle "G"]

In our testing with Xengine, especially on sim startup, it never pegs the CPU on our Hyper-V VM's. DotNetEngine however does peg the CPU on startup causing much longer delays and lag for other sims on the VM. For this reason alone there is no choice for us but Xengine.
Kyle G
www.reactiongrid.com 


-----Original Message-----
From: opensim-dev-bounces at lists.berlios.de [mailto:opensim-dev-bounces at lists.berlios.de] On Behalf Of Sean Dague
Sent: Monday, December 08, 2008 6:23 PM
To: opensim-dev at lists.berlios.de
Subject: [Opensim-dev] RFC: Changing default script engine to xengine

This is a request for comments on changing the default script engine to
xengine.  There was a thread about this a couple of months ago in which
the resolution was to wait until 0.6 was released.

Here are the pros - cons as I see it:

Cons
* a change like this, no matter how prepared we are, can cause some
temporary breaks in people's environments

Pros
* xengine uses less memory than dotnet engine
* xengine uses less cpu than dotnet engine -
http://xyzzyxyzzy.net/2008/11/07/a-brief-look-at-dotnetengine-vs-xengine/
* xengine doesn't do the event drop which causes lots of bug reports
like this one: http://opensimulator.org/mantis/view.php?id=2777

I'm sure there are other pros and cons, and I'm happy for others to
throw them out here.  I've been telling every IBM internal team to use
XEngine for the past 6 months, and every one say a performance and
stability increase after they made the change.

I think that making it the default out of the box will reduce a lot of
issues that new users are having with OpenSim, and it definitely along
the lines of trying to make as much work right out of the box as we can.

Opinions?  Comments?  I'd like to try to achieve consensus over the next
couple of days so we could make such a change.

	-Sean

-- 
Sean Dague / Neas Bade
sdague at gmail.com
http://dague.net



No virus found in this incoming message.
Checked by AVG - http://www.avg.com 
Version: 8.0.176 / Virus Database: 270.9.12/1822 - Release Date: 12/9/2008 9:59 AM

No virus found in this outgoing message.
Checked by AVG - http://www.avg.com 
Version: 8.0.176 / Virus Database: 270.9.12/1822 - Release Date: 12/9/2008 9:59 AM