User:Babbage Linden/Office Hours/2008 10 08

Transcript of Babbage Linden's office hours:

[8:13]	Fake Fitzgerald:	hi Babbage
[8:13]	Babbage Linden:	hello
[8:13]	Goldenstar Bright:	hello
[8:14]	Malburns Writer:	Hi Babbage, Hi all - thought would pop in
[8:14]	Babbage Linden:	hi
[8:14]	Fake Fitzgerald:	hi
[8:14]	Babbage Linden:	not much news on mono this week
[8:14]	Babbage Linden:	we've been doing security fixes
[8:14]	Babbage Linden:	the outstanding issues in jira are herre
[8:14]	Babbage Linden:	http://jira.secondlife.com/browse/SVC-1276
[8:14]	Babbage Linden:	but at least some of them have been fixed
[8:15]	Babbage Linden:	SVC-3099 for example
[8:15]	Babbage Linden:	and I think SVC-3036 has been fixed too
[8:15]	Malburns Writer:	k - loading
[8:15]	Babbage Linden:	we're going through them at the moment triaging
[8:15]	Babbage Linden:	any issues that are particularly problematic for you atm?
[8:17]	pipinpa Allen:	hi there :)
[8:17]	Malburns Writer:	Not for me - not on tech side of things - news here really - we met again brifly yesterdat at WVE
[8:17]	Babbage Linden:	hello
[8:17]	Fake Fitzgerald:	hi
[8:17]	Babbage Linden:	thanks for coming
[8:17]	pipinpa Allen:	:)
[8:17]	Babbage Linden:	i've been seeing announcements about people releasing mono versions of products
[8:17]	Babbage Linden:	which is good
[8:17]	Babbage Linden:	seems like people are getting the confidence to use mono in anger now
[8:20]	Babbage Linden:	have any of you been seeing .net error messages when using mono recently?
[8:21]	Babbage Linden:	looks like http://jira.secondlife.com/browse/SVC-2908 is still getting comments
[8:21]	Fake Fitzgerald:	I have not seen mono errors recently.
[8:22]	pipinpa Allen:	91votes!
[8:22]	pipinpa Allen:	ahh
[8:23]	pipinpa Allen:	well, Babbge
[8:23]	Babbage Linden:	it was a big issue pipinpa
[8:23]	pipinpa Allen:	is the UK is cold today?
[8:23]	pipinpa Allen:	brrrr?
[8:24]	Babbage Linden:	but we've fixed most of the problems
[8:24]	Babbage Linden:	there seem to be some issues still causing .net exceptions
[8:24]	Babbage Linden:	but they are far less frequent
[8:24]	Malburns Writer:	Not too bad Pipina - some sun lol
[8:24]	pipinpa Allen:	i see
[8:24]	pipinpa Allen:	ahh lol
[8:24]	Babbage Linden:	hi trinity
[8:24]	Trinity Coulter:	hi :)
[8:24]	Babbage Linden:	we went to be the beach at lunch time
[8:24]	Fake Fitzgerald:	hi Trinity
[8:24]	Babbage Linden:	it's pretty sunny in brighton
[8:25]	pipinpa Allen:	lovery day :)
[8:25]	Fake Fitzgerald:	I have no error for mono scripts, but I have a question for mono scripts about memory usage.
[8:25]	pipinpa Allen:	hi :)
[8:26]	Malburns Writer:	I have been asked what may be an off-topic question, but is release on Mono 2 significant in any way as far as impact on SL?
[8:26]	Fake Fitzgerald:	is the garbage collection of mono scripts asynchronous?
[8:27]	Babbage Linden:	fake, no it happens synchronously
[8:27]	Babbage Linden:	but the managed heap is small, so it doesn't take long
[8:27]	Babbage Linden:	we haven't seen any GC pauses of any significant length
[8:28]	Babbage Linden:	malburns, we may be moving to mono 2.0 in the future
[8:28]	Babbage Linden:	we need it's verifier for C#
[8:28]	Babbage Linden:	but none of the other features are particularly important to us
[8:29]	Malburns Writer:	ok
[8:29]	Arawn Spitteler:	Mono comes from ssomewhere?
[8:30]	Babbage Linden:	mono is an open source project
[8:32]	Object: Hello, Avatar!
[8:32]	Object	[script:mono GC test]: Script run-time error
[8:32]	Object	[script:mono GC test]: Stack-Heap Collision
[8:33]	Object	[script:mono GC test]: Script run-time error
[8:33]	Object	[script:mono GC test]: Stack-Heap Collision
[8:33]	Babbage Linden:	thanks fake
[8:33]	Babbage Linden:	what does it do?
[8:33]	Babbage Linden:	i can't mod it
[8:33]	Fake Fitzgerald:	this scripts shows the garbage collect of mono scipts is asynchronous, I think..
[8:34]	Fake Fitzgerald:	sorry lol
[8:34]	Fake Fitzgerald:	fill the list in first loop, and replace same length of list in second loop
[8:35]	Fake Fitzgerald:	and llSetText for times of second loop
[8:35]	Fake Fitzgerald:	reset the script and touch the prim
[8:36]	Babbage Linden:	drat, i'm not using the rc viewer so can't test it
[8:36]	Babbage Linden:	i'll check it out later
[8:36]	Fake Fitzgerald:	ok
[8:36]	Arawn Spitteler:	http://en.wikipedia.org/wiki/Mono_(software)
[8:38]	Babbage Linden:	arawn, yes that's the mono we're talking about
[8:38]	Babbage Linden:	it now runs scripts in second life
[8:40]	Babbage Linden:	are any of you using mono for things you can demo?
[8:41]	Arawn Spitteler just let's things copile to Mono
[8:41]	Babbage Linden:	great
[8:41]	Babbage Linden:	and you haven't had any issues?
[8:41]	Arawn Spitteler:	Not yet, but I tend to light scripting.
[8:42]	Arawn Spitteler:	My big challeng e now is meta programming, where I figure out how to order my thoughts
[8:42]	Babbage Linden:	well, that's good
[8:42]	Babbage Linden:	if the language is not getting in your way
[8:43]	Arawn Spitteler:	LSL I can handle, but I find it's time for modular viewer optimization, so greaphics cards don't get smoked by Windlight
[8:44]	Arawn Spitteler:	I've got to learn enough Java, to translate the viewer source to C++
[8:44]	Arawn Spitteler:	How different is C# from C++?
[8:44]	Babbage Linden:	c# is closer to java
[8:45]	Babbage Linden:	but it has many of the same features as c++
[8:45]	Babbage Linden:	classes, objects, inheritence etc.
[8:45]	Arawn Spitteler:	Whether you can write a compiler to compile itself, C# was tested, but I don't think Java was.
[8:46]	Arawn Spitteler:	I recall there was a book written, to prove that 1+1=2, so there might be a word for that sort of thing
[8:46]	Babbage Linden:	you can generally bootstrap a language to compile itself
[8:46]	Babbage Linden:	as soon as it can do file i/o
[8:47]	Babbage Linden:	the biggest news this week is that http in has passed qa
[8:47]	Babbage Linden:	and we're planning to deploy it to the preview grid soon
[8:47]	Arawn Spitteler:	Http-In?
[8:47]	Babbage Linden:	it allows LSL scripts to be HTTP servers
[8:47]	Babbage Linden:	they can request HTTP urls
[8:47]	Babbage Linden:	and then process HTTP requests to that URL
[8:48]	pipinpa Allen:	ahh, intersting
[8:48]	Arawn Spitteler:	So, once I've scripted Collosal Cave, into LSL, we'll be able to bring blind people in world
[8:49]	Arawn Spitteler:	This is the other side of HTTPRequest? Won't that soak up Sim resources?
[8:49]	Babbage Linden:	not really
[8:49]	Babbage Linden:	it's less resource intensive than XML-RPC or email as we don't do routing
[8:49]	Babbage Linden:	instead of finding a script and delivering it an email or XML-RPC call
[8:49]	Babbage Linden:	we just give the script a URL
[8:50]	Babbage Linden:	which it can tell other scripts about
[8:50]	Babbage Linden:	or send outside SL
[8:50]	Babbage Linden:	and then normal routing will find the script
[8:50]	Babbage Linden:	so we lean on the internet
[8:51]	Babbage Linden:	if a region goes down or the script moves it needs to re-request and publish it's URL
[8:51]	Babbage Linden:	but it's easy to write a URL mapper
[8:51]	Babbage Linden:	as an external web service
[8:51]	Babbage Linden:	that will redirect requests to the currently registered URL
[8:52]	Babbage Linden:	for a service in SL
[8:52]	Babbage Linden:	and then use REST to provide links from that entry point URL
[8:52]	Babbage Linden:	which would like a lot like dynamic DNS
[8:52]	Malburns Writer:	will this impact/enhance web displays on land feed?
[8:53]	Babbage Linden:	it's not about embedding web pages in SL
[8:53]	Babbage Linden:	it's about being able to exchange data with the web from LSL scripts
[8:53]	Babbage Linden:	bidirectionally
[8:53]	Babbage Linden:	currently LSL scripts can call out to the web
[8:53]	Babbage Linden:	but need to poll if they want to sync with external data
[8:53]	Malburns Writer:	k - just wondered if had additional implications
[8:54]	Babbage Linden:	with http in they will be able to make a request and give a URL
[8:54]	Babbage Linden:	which can be called back when data changes
[8:54]	Babbage Linden:	to avoid polling
[8:55]	Babbage Linden:	it will make SL web applications much easier to write
[8:55]	Babbage Linden:	and will be more reliable than XML-RPC or email
[8:55]	pipinpa Allen:	i think so
[8:55]	Babbage Linden:	which currently get overloaded
[8:55]	Babbage Linden:	and perform badly
[8:55]	Malburns Writer:	great - i understand the principle
[8:56]	Babbage Linden:	hopefully i'll have more information about it for you next week
[8:57]	pipinpa Allen:	thank you for giving good news :)
[8:57]	Arawn Spitteler:	Have we something like a changed event for Sim Crash?
[8:57]	Babbage Linden:	yes, the script will be told via changed when there has been a restart
[8:57]	Babbage Linden:	or region crossing
[8:58]	Babbage Linden:	so it can re-request and publish urls
[8:58]	Arawn Spitteler:	So it would be a CHANGED_REFGION
[8:59]	Babbage Linden:	yes
[8:59]	Arawn Spitteler:	There was some discussion, s to whether such an option existed
[8:59]	Arawn Spitteler:	It was an idea, of sending tps to attendees who got booted by sim crashes
[9:00]	Arawn Spitteler:	Soon but not yet?
[9:00]	Babbage Linden:	it will be available with http in on preview soon
[9:00]	Babbage Linden:	but you will be able to use it for other applications
[9:01]	Babbage Linden:	ok, i need to go
[9:01]	Babbage Linden:	thanks for coming everyone
[9:01]	Malburns Writer:	thanks Babbage
[9:01]	pipinpa Allen:	:)
[9:01]	Babbage Linden:	i'll give more details about http in next week
[9:01]	Larry Massey:	wrapping up
[9:01]	Arawn Spitteler:	I think it might have been during a rash o fsim resets
[9:01]	Babbage Linden:	and hopefully news on the preview
[9:01]	Larry Massey:	too bad, wanted to talk about http
[9:01]	Babbage Linden:	next week larry :-)
[9:02]	Babbage Linden:	see you then
[9:02]	Arawn Spitteler:	We'll be able to sit here, and play Collasal Cave in Preview?
[9:02]	pipinpa Allen:	see ya soon :)
[9:02]	Malburns Writer:	bye