Article Posted: Advanced Load Testing Features of VSTS

I've posted an article that discusses some of the advanced features of VSTS Load Testing.   The article goes into more detail on these features than can be found in the existing online documentation, and describes some things that may not be at all obvious from the user interface.    Please read, enjoy, ask questions, and comment.   The article can be found here:

Comments (7)
  1. Sinclair says:

    Hello Bill, thanks for a great article.

    We recently started to work on the performance of our ASP NET 2.0 application. Unfortunately, there is not much info in MSDN on advanced issues of the Web Testing feature of VS2005.

    We ran into a minor problem and I hope you can help:

    Some of the dependent requests for our pages are reported as failures. Some third-party component we use specifies src="javasrcipt:false" for some images (these are processed later via client-side javascript). Test Runner reports these URLs as failures (The URI prefix is not recognized), while we want to ignore them. I tried to implement a custom request pligin, but it is never invoked for these requests.

    Could you please tell us how to prevent these URLs from being reported as errors?

  2. says:

    Sorry for the delayed response – I was OOF on jury duty for 7 days.

    Anyway, if you haven’t already seen Josh Christie’s article on Web Test Authoring and Debugging Techniques, check it out at:

    Also check out his blog:

    Unfortunately, we don’t have a great solution for the problem you describe, though we realize it is a problem.    One option is to set the value for the request property "Parse Dependent Requests" to false for the web test request that contains these dependent requests.    With this setting none of the dependent requests on that page will be automatically fetched; you can then explicitly add back the dependent requests that you do want in the web test editor.

  3. backwards says:

    Morning Bill,

    Call me silly but I cant seem to incorporate modal dialogue (that is another window that pops up once you being on the same page click on "Add new" button)  into my load test scenario. It only keeps track of HTTP traffic from one page to another (a collection of URLs) but what can be done with modal dialogue/pop-up windows? Can we make it a part of our script?

    Thanks a bunch,

    Ellie Parker

  4. says:

    You are correct that web tests deal with HTTP traffic and don’t simulate pop-up windows and other browser interactions and javascript operations.    I suggest you take a look at Josh Christie’s article on Web Test Authoring and Debugging techniques which goes into detail about what you can and can’t do with web tests, and some ideas for accomplishing what you want to do.   You can find this at:

  5. We recently ran a bootcamp for some of our internal teams on the testing capabilities of Visual Studio

  6. RSS It All says:

    We recently ran a bootcamp for some of our internal teams on the testing capabilities of Visual Studio

  7. Visual Studio Team System for Testers Content Index for Web Tests and Load Tests Getting Started Online

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