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Is there any way to shortcut some of the Spinup of my Silverlight App

Printed From: IdeaBlade
Category: DevForce
Forum Name: DevForce 2009
Forum Discription: For .NET 3.5
URL: http://www.ideablade.com/forum/forum_posts.asp?TID=1589
Printed Date: 06-Apr-2025 at 6:26pm


Topic: Is there any way to shortcut some of the Spinup of my Silverlight App
Posted By: skingaby
Subject: Is there any way to shortcut some of the Spinup of my Silverlight App
Date Posted: 16-Dec-2009 at 8:10am
My Silverlight project is but one module of a years old project that is in production. This new module will present to the user in the content panel of a host ASP.Net page. I.e. when they click on most of the menu items on the left, the content panel shows an APSX page on the right, but in my case, it will be opening the default.aspx of my Silverlight web host project and it will launch the Silverlight app inside thaqt content panel.
So, whether I like it or not, the users will be actively complaining about the speed difference. The old pages come up fast, the new-fangled Silverlight page, which has taken forever and a day to actually build, comes up significantly more slowly.

There are 3-8 seconds between when the Ideablade server side writes its first entry, and when the first query gets processed. Most of the entries step through the DevForce spinup before we get to my first query. A couple of the entries indicate "Probed for..." And one in particular, seems to take 2-5 seconds: Probed for IIdentityIdGenerator.

In case it's relevant: we have an oracle back end with the Devart dotConnect drivers.

Are there any suggestions for how I can get the silverlight page to spin up faster?

Thanks, Simon

Here's my DebugLog:

2009-12-16 10:55:09 IdeaBlade.Core TraceFileXmlLogger::GetLogHeader ------------ Log Created ------------
2009-12-16 10:55:09 IdeaBlade.Core TraceFns::Initialize IdeaBladeConfig resolution: File: C:\_dev\POG\Png.GcsAg\GcsAg.ExperimentWeb\web.config - found
2009-12-16 10:55:09 IdeaBlade.Core TraceFns::Initialize IdeaBladeConfig resolution: Logging file: C:\_dev\POG\Png.GcsAg\GcsAg.ExperimentWeb\log\DebugLog.xml
2009-12-16 10:55:09 IdeaBlade.Core TraceFns::Initialize Bound to .NET runtime version 2.0.50727.3082
2009-12-16 10:55:09 IdeaBlade.Core TraceFns::Initialize DevForce version 5.2.4.0
2009-12-16 10:55:09 IdeaBlade.Core AuthHelper::LoadRuntimeLicense IdeaBlade License: 'Silverlight', KeyDate: 6/12/2009, AllowedSessions: 10000. Found on Assembly: 'Png.GcsAg.Model.DomainModel, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'
2009-12-16 10:55:09 IdeaBlade.Core ReflectionFns::GetAssembly Info: Unable to load assembly - file not found: Png.GcsAg.ServerModelEF
2009-12-16 10:55:09 IdeaBlade.EntityModel EntityServiceApplication::OnServiceStartup EntityService created
2009-12-16 10:55:09 IdeaBlade.EntityModel.Server EntityServer::.ctor EntityServer created for DataSourceExtension: [None]
2009-12-16 10:55:09 IdeaBlade.EntityModel.Server SessionManager::<GetLoginManager>b__8 Probed for 'IEntityLoginManager' and found Png.GcsAg.Model.DomainModel.SimpleLoginManager
2009-12-16 10:55:09 IdeaBlade.EntityModel.Server EntityServerHost::ConfigureServiceHost Using DC serializer
2009-12-16 10:55:09 IdeaBlade.EntityModel.Server EntityServerHost::ConfigureServiceHost EntityServer is using the SilverlightFaultBehavior
2009-12-16 10:55:09 IdeaBlade.EntityModel.Server ServerHostFactory::CreateServiceHost EntityServer listening on http://localhost:9009/EntityServer.svc
2009-12-16 10:55:10 KINGASI IdeaBlade.EntityModel.Server EntityServer::Fetch Fetch ... value(IdeaBlade.EntityModel.EntityQueryProxy`1[Png.GcsAg.Model.DomainModel.SecAppUser]).Where(u => u.SecUserId.Equals("KINGASI"))
2009-12-16 10:55:10 KINGASI IdeaBlade.EntityModel IdGeneratorFactory::GetIdGenerator Probed for 'IIdentityIdGenerator' and found IdeaBlade.EntityModel.StoreGeneratedIdGenerator
2009-12-16 10:55:12 KINGASI IdeaBlade.EntityModel.Edm ObjectQueryProcessor::WriteGeneratedSql SELECT "Project1".SEC_USER_ID AS SEC_USER_ID, "Project1".SEC_USER_NAME AS SEC_USER_NAME, "Project1".SEC_USER_PASSWORD AS SEC_USER_PASSWORD, "Project1".SEC_USER_PHONE AS SEC_USER_PHONE,


Replies:
Posted By: davidklitzke
Date Posted: 16-Dec-2009 at 11:07am
Have you considered using the InvokeServerMethodAsync to Preload the Cache.
 
A code sample was added in the Learning Resources of Release 5.2.4.2 (under the sub-topic Remote Service Methods) which illustrates how to call a server method asynchronously to preload the cache with an arbitrary collection of data. The solution is a Silverlight one, but the code to call and use the results of the remote service method has no Silverlight-specific aspects and will work just as well in another type of application. Solution in C#; key code elements also translated into VB in a separate text file.

Posted By: skingaby
Date Posted: 17-Dec-2009 at 6:55am
Yes. There was a long discussion with kimj about the query performance and various strategies to get around the problems. I also worked with David when he was here to sort some of the loading process out too.
We are currently using a daisy chain of EntityManager.ExecuteQueryAsync because it seems to be the best option in 5.2.3. I have d/l 5.2.4 and will be re-evaluating the query performance there. However, my question is not about query performance, nor the async performance, but rather, about the other myriad things that happen in the spin up to see if there are any of them that I can speed up by changing the configuration so your code doesn't have to Probe for stuff, or if there is any other spin up stuff that could be sped up in some way. Thanks.

Posted By: skingaby
Date Posted: 17-Dec-2009 at 11:10am
Sorry, here's the link to the performance discussion: http://www.ideablade.com/forum/forum_posts.asp?TID=1499 - http://www.ideablade.com/forum/forum_posts.asp?TID=1499

Posted By: kimj
Date Posted: 22-Dec-2009 at 9:30am
What you need is a way to do application warm up prior to the first user request.  WCF services in IIS use message-based activation, which means they don't start until explicitly requested.  For DevForce this means that the BOS (the EntityService and any EntityServers) don't start until needed.  If you're using IIS 7.5 there's actually a warm up module available; if you're running an earlier version you'll need a do-it-yourself approach.  This can be as simple as a scheduled script which navigates to the services, e.g., http://myhost/mysite/EntityService.svc - http://myhost/mysite/EntityService.svc and http://myhost/mysite/EntityServer.svc - http://myhost/mysite/EntityServer.svc .  Navigating to both these URLs will start the BOS, and will reduce some of that spin up time you're seeing.
 
Your log also shows that most of the delay is in the first fetch.  If you're not already using them, pre-generated views for the entity model can have a huge performance impact.   See http://msdn.microsoft.com/en-us/library/bb896240.aspx - http://msdn.microsoft.com/en-us/library/bb896240.aspx  for more information.  If you don't want to use the pre-generated views, then doing some sort of dummy query, and dummy save, in a warm up script will effectively do the same thing.
 
A few other things to look at - make sure you're not doing a debug compilation (the  <compilation debug=”true”/> switch in the web.config) or even look at pre-compiling the web site using aspnet_compiler.
 


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