aspnet-scripts.telerikstatic.com is very slow

21 posts, 0 answers
  1. Kevin Cabritit
    Kevin Cabritit avatar
    20 posts
    Member since:
    Sep 2009

    Posted 17 May 2011 Link to this post

    Hi,

    I am having issues with the following server for the CDN: aspnet-scripts.telerikstatic.com

    See attached Firebug screengrab showing the delay.

    This happens consistently, and is getting very, very frustrating.

    Any ideas?

    Cheers,
    -alex
  2. Paul
    Paul avatar
    49 posts
    Member since:
    Dec 2008

    Posted 20 May 2011 Link to this post

    I generally saw worse performance with the CDN and have now disabled the CDN. Maybe the CDN improves response time for users on another continent, but in the same continent as the web server I get better and more consistent response without the CDN.
  3. Simon
    Admin
    Simon avatar
    2281 posts

    Posted 23 May 2011 Link to this post

    Hi guys,

    @Alex For how long have you been experiencing this slowness? Is there any improvement? These response times are really unusual and this may be a temporary problem with the edge server from which you are getting the resources.

    @Paul It depends on the Internet connection in the areas where your site is hosted and accessed. It is possible to have better response times without the CDN for those locations if the connection is really good, however, in the rest of the cases CDN will provide better response times.

    Greetings,
    Simon
    the Telerik team

    Browse the vast support resources we have to jump start your development with RadControls for ASP.NET AJAX. See how to integrate our AJAX controls seamlessly in SharePoint 2007/2010 visiting our common SharePoint portal.

  4. Kevin Cabritit
    Kevin Cabritit avatar
    20 posts
    Member since:
    Sep 2009

    Posted 23 May 2011 Link to this post

    I'll monitor the response over the next few days as I'm doing some work in VS this week.

    Will let you know if the problem remains.
  5. Kevin Cabritit
    Kevin Cabritit avatar
    20 posts
    Member since:
    Sep 2009

    Posted 30 May 2011 Link to this post

    I'm still experiencing issues with this from time to time.

    It's continually 'blocking'...

  6. Simon
    Admin
    Simon avatar
    2281 posts

    Posted 03 Jun 2011 Link to this post

    Hello Alex,

    This is most probably an issue with the edge server, which you are hitting. As we do not have control over this and cannot fix it I suggest you disable CDN in your application.

    Kind regards,
    Simon
    the Telerik team

    Browse the vast support resources we have to jump start your development with RadControls for ASP.NET AJAX. See how to integrate our AJAX controls seamlessly in SharePoint 2007/2010 visiting our common SharePoint portal.

  7. John Harrison
    John Harrison avatar
    23 posts
    Member since:
    May 2010

    Posted 14 Nov 2011 Link to this post

    Really? That's Telerik's official response?

    Wow.
  8. Richard
    Richard avatar
    1 posts
    Member since:
    Nov 2010

    Posted 02 Mar 2012 Link to this post

    CDN's are still extremely slow.  I've stumbled across several sites that also use telerik and have a noticeable pause when the scripts are downloaded.

    Has the official Telerik response changed?
  9. Scott
    Scott avatar
    68 posts
    Member since:
    Nov 2011

    Posted 11 Apr 2012 Link to this post

    Yes... I too am experiencing this... there is a VERY NOTICEABLE 3 - 10 second pause when loading pages that use Telerik's CDN... makes our site seem SUPER SLOW and not very responsive.. not the kind of impression we want for our users... so we'll be removing it... unless there is a fix or a faster server... We are located in Tennessee... fyi...
  10. Lini
    Admin
    Lini avatar
    2144 posts

    Posted 12 Apr 2012 Link to this post

    Hi,

    The CDN servers use the DNS resolve request you make to determine your rough physical location and return the closest edge server that can handle the request. If you are using a public DNS service (e.g. Google public DNS, OpenDNS), then this resolution could take more time and take you to a server that is going to be far away and slow to respond.

    Please check if you are using custom DNS server or if your ISP has had connection problems to the Amazon CloudFront CDN.

    Kind regards,
    Lini
    the Telerik team
    If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed now.
  11. Bill O'Neil
    Bill O'Neil avatar
    113 posts
    Member since:
    Nov 2004

    Posted 28 Aug 2013 Link to this post

    Has anyone who has experienced this found any answers (other than disabling CDN?)

    We have several clients who have experienced this - specifically w/ http://aspnet-scripts.telerikstatic.com - and its gotten worse over the past 2 weeks.

    Disabling CDN is problematic for several reasons - and I'm hoping I can get them some information that will explain these issues...

  12. Marin Bratanov
    Admin
    Marin Bratanov avatar
    4944 posts

    Posted 29 Aug 2013 Link to this post

    Hi Bill,

    I am sorry to hear that some of your users are not having the best experience with the CDN provider.

    We cannot, however, control the Amazon servers which are used to host it and the concrete client's network connectivity to these edge servers is what can cause issues.

    What I can suggest is configuring your own CDN provider: http://www.telerik.com/help/aspnet-ajax/cdn-custom-provider.html.


    Regards,
    Marin Bratanov
    Telerik
    If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed now.
  13. Bill O'Neil
    Bill O'Neil avatar
    113 posts
    Member since:
    Nov 2004

    Posted 29 Aug 2013 Link to this post

    For what its worth - it appears aspnet-scripts.telerkstatic.com is totally unreachable today.
  14. Marin Bratanov
    Admin
    Marin Bratanov avatar
    4944 posts

    Posted 30 Aug 2013 Link to this post

    Hello Bill,

    I am afraid that we cannot control the Internet connectivity between two endpoints that are not in our internal network. You can contact your network administrators or ISP for assistance with troubleshooting such issues.


    Regards,
    Marin Bratanov
    Telerik
    If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed now.
  15. Bill O'Neil
    Bill O'Neil avatar
    113 posts
    Member since:
    Nov 2004

    Posted 06 Sep 2013 Link to this post

    I've found mention that the Telerik examples once used a sort of javascript/cookie base fallback for CDN (the file QsfCdnConfigurator.cs is mentioned.)  I don't see it in the current examples - was it decided that it didn't function well?  I'm wondering if a solution like that could ease the pain of some of my clients w/o abandoning the CDN entirely.
    Bill
  16. Marin Bratanov
    Admin
    Marin Bratanov avatar
    4944 posts

    Posted 06 Sep 2013 Link to this post

    Hello Bill,

    Such a feature will require research and what I can to at this point is to log it in our database for further examination. You can use the following link to leave your comments, vote and follow its progress: http://feedback.telerik.com/Project/108/Feedback/Details/57780. I have updated your Telerik points for sharing your ideas and feedback.


    Regards,
    Marin Bratanov
    Telerik
    If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed now.
  17. Gary
    Gary avatar
    20 posts
    Member since:
    Oct 2012

    Posted 09 Oct 2013 Link to this post

    I just came across this thread as I am experiencing a similar performance issue whenever I hit the CDN. I'm really surprised that this thread which is over 2 years old is still relevant!
  18. Bill O'Neil
    Bill O'Neil avatar
    113 posts
    Member since:
    Nov 2004

    Posted 09 Oct 2013 Link to this post

    There is absolutely appears to be an issue more global than individual networks.  We've found that the - for many users - aspnet-scripts.telerikstatic.com hangs - even when cached.  It makes Telerik CDN almost unusable.

    Haven't found a solution - either w/ Telerik or w/ individual service providers/network admins.

    Bill
  19. Gary
    Gary avatar
    20 posts
    Member since:
    Oct 2012

    Posted 09 Oct 2013 Link to this post

    Yeah. All the scripts are cached and it still takes an unacceptable amount of time to return a 304 response. Looks like I'm going to have to abandon the CDN. No way I can persist like this.
  20. Bill O'Neil
    Bill O'Neil avatar
    113 posts
    Member since:
    Nov 2004

    Posted 09 Oct 2013 Link to this post

    That's the same thing I've seen - not on my network - but on multiple client sites I've found the page hanging (waiting on telerikstatic.com) and when I look closer it LOOKS like the CDN returns a 304 but the browser just HANGS.
  21. Genady Sergeev
    Admin
    Genady Sergeev avatar
    1600 posts

    Posted 15 Oct 2013 Link to this post

    Hello guys,

    The CloudFront edge servers are very well connected to the internet and in general provide excellent speed around the globe. However, if it happens that you intranet goes through proxy servers or, as written earlier in this thread, if you are using a public DNS service (e.g. Google public DNS, OpenDNS), then this resolution could take more time and take you to a server that is going to be far away and slow to respond.

    If this is the case it might be faster not to use CDN or use local CDN, as explained the custom CDN help article.


    Regards,
    Genady Sergeev
    Telerik
    If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to the blog feed now.
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