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Running performance and load tests

From: Visual Studio 2010 Essential Training

Video: Running performance and load tests

I've found that many developers are not aware that you can set up and run complex web load tests for an ASP.NET Application. You can do this right from within Visual Studio, as long as you have the Ultimate edition. If you don't have the Ultimate version, you won't be able to follow along with this demonstration. I'm going to create two types of tests: a performance test which is intended to determine how fast some aspect of a system performs under workload, then I'll create a load test which is a simulated real-world test that exercises the web site by running the designated performance tests.

Running performance and load tests

I've found that many developers are not aware that you can set up and run complex web load tests for an ASP.NET Application. You can do this right from within Visual Studio, as long as you have the Ultimate edition. If you don't have the Ultimate version, you won't be able to follow along with this demonstration. I'm going to create two types of tests: a performance test which is intended to determine how fast some aspect of a system performs under workload, then I'll create a load test which is a simulated real-world test that exercises the web site by running the designated performance tests.

I'm going to use his project called WebsiteToLoadTest to write my tests against. This is just a simple ASP.NET site. Now before you run the test, make sure you are running Visual Studio as an administrator; otherwise you will not be able to perform the load tests. Next, I'm going to run my application. Since I'm running on a development server, I need the copy the port number from my local host before I create my web tests. So I'll copy this, and then I'll close that browser window.

Then I'm going to go to my Test menu and create a brand-new test. I'm starting by creating a web performance test. I'm going to call this one GoToAsp. I'll pick a language, C#--although it doesn't matter for this example--and then I'll click OK. Visual Studio realizes I haven't created a test project yet. I'll call this one BasicLoadTests and then click Create and then OK to this dialog. A number of things has happened.

If you look in the Solution Explorer, you'll see there is a Solution folder has been created, also a new GoToAsp.webtest file has been created, and then Visual Studio has launched this version of Internet Explorer with this special plug-in running called the Web Test Recorder. What I'm going to do is I'm going to paste that URL in that I copied a few seconds ago. And now I'm going to go back and restart my web server because it's not running. So we will go back over here and choose Debug > Start Debugging. That looks better.

So now what I'll do is I step through the test steps. The user is going to click on this link, which takes him to another site, and they're going to click on the Back button. Now, I'm done recording the test, so I'll click Stop. At this point, you'll see a dialog. You might have to wait a few seconds for this dialog to disappear. Next, I'm going to create a second web test by going to Test > New Test > Web Performance Tests. I'm going to call these one FailedLogin, place it in the same test project, verify that my browser is still running. It's not, so I'm going to have start my browser. And what the user is going to do this time is they are going to click on this Log In button.

I'll type in their name and a bad password, and click Log In. It fails and then the user goes back to the homepage. That's my next test. I'll choose Stop, and save. Now I've got my two performance tests. I'm going to create a load test. Remember that a load test simulates workload on the site. Now I'm going to go up to Test > New Test > Load Test. I will go ahead and leave it as the default name, and then click on OK. Since I'm simulating users coming to this site, I am going to go through the Scenario system here.

First, it's going to ask me to give the name for this scenario. I'm going to pick the defaults. I'm going to suggest that we have 25 users exercising the site. This is changeable, naturally. I'm going to skip over this one, and then I'm going to come in here and add those two tests I just created. I'm going to add the FailedLogin and then GoToASP, and then I'll click on OK, and then I click on Next. Here I can choose how to simulate what type of network connections our users are connecting with.

So I can come here and choose Add, and say that some of our users are coming in on a 56K modem--about 10% are using that--and then I'll click on Add and have other network settings here. Now I don't want a actually keep these items in here, because if I do, it's going to install some extra network emulators which I don't want to wait for that process to happen. So I'm going to choose Remove, and Remove, and then click on Next. Here, I can pick the browser mix. Again, I go to the Add button, and say that we've got some people coming to you with Firefox 3.

20% of our users are using Firefox 3, and 5% of our users are using Chrome too, and so on. So I pick these mixes, and I'm going to remove these for testing purposes today, and then I click on Next. This one allows me to add other computers to run against the server. I'm just going to use my single computer today, And then here, I'm going to pick the test duration time. I don't want this to be too long, so I am just going to type in 30 seconds for the test duration. I will click on Finish, and now I'm ready to run my test.

I think before that, I should build my application. I will choose Build > Build Solution, and then I'll go to my Test > Window and choose Test List Editor. And notice I have three tests. I am only going to run the LoadTest1. I don't need to run these two individual ones because they are going to be the part of the LoadTest. I also need to verify that my web site is running. I will switch over here, go to my Test editor and run the test. After waiting 30 seconds, the test completes. I can then click on this hyperlink here to see my test results.

I see that my test passed. I can also right-click here and choose View Test Results Details and see a more detailed result screen. Here, I can see a summary, when the test was run, how long it took, what were my slowest pages, and then I can look at a set of graphs, a set of detailed table information. I see that I had 13 total test run on FailedLogIn and 28 tests were run on GoToASP and how long each one of those test took. Quite a bit of details here about what's happening on your web site.

There is more to learn about performance and load testing. For example, you should never run the load test from your developer computer. Instead, you should set up a testing ring and have it test the site. This enables you to scale your test to simulate a realistic runtime load. You can also create simulated users, or use data-driven tests to simulate users' search strings and other complex test scenarios.

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This video is part of

Image for Visual Studio 2010 Essential Training
Visual Studio 2010 Essential Training

86 video lessons · 31803 viewers

Walt Ritscher
Author

 
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  1. 2m 3s
    1. Welcome
      1m 2s
    2. Using the exercise files
      1m 1s
  2. 7m 19s
    1. Understanding the Visual Studio versions
      3m 51s
    2. Setting up your developer computer
      3m 28s
  3. 58m 2s
    1. Creating a Visual Studio project
      4m 58s
    2. Working with Solution Explorer
      6m 32s
    3. Working with big projects
      3m 53s
    4. Taking a tour of the Integrated Developer Environment (IDE)
      8m 36s
    5. Introducing drag-and-drop UI design
      7m 38s
    6. Working with the Properties window
      6m 44s
    7. Looking at Server Explorer
      7m 4s
    8. Exploring the new Help engine
      6m 41s
    9. Setting options for the IDE
      5m 56s
  4. 39m 25s
    1. Creating a simple WPF application
      1m 32s
    2. Building the UI with the editors
      9m 14s
    3. Working with the application code
      3m 37s
    4. Communicating with the web site
      7m 15s
    5. Connecting your data
      8m 4s
    6. Binding to an RSS feed
      5m 4s
    7. Packaging and deploying the application
      4m 39s
  5. 39m 46s
    1. What languages are supported in Visual Studio 2010?
      1m 17s
    2. Exploring basic settings for the Code Editor
      5m 35s
    3. Writing a C# program
      6m 48s
    4. Writing a VB program
      6m 29s
    5. Working with C++
      6m 38s
    6. Working with F Sharp
      6m 9s
    7. Font and color options
      6m 50s
  6. 1h 5m
    1. Formatting your code
      6m 43s
    2. Navigating your code
      7m 44s
    3. Using the Task List
      2m 26s
    4. Commenting your code
      2m 45s
    5. Documenting your code
      8m 26s
    6. Using IntelliSense effectively
      7m 0s
    7. Working with code snippets
      6m 25s
    8. Refactoring your code
      5m 15s
    9. Understanding code generation
      2m 10s
    10. Generating code with T4
      6m 29s
    11. Using the Class View, Class Designer, and Class Diagram tools
      5m 51s
    12. Refactoring VB with CodeRush Xpress
      4m 33s
  7. 1h 11m
    1. Working with project and item templates
      8m 38s
    2. Creating a console application
      7m 5s
    3. Creating a class library
      6m 26s
    4. Creating a web site with ASP.NET
      7m 37s
    5. Creating a rich internet application with Silverlight
      6m 57s
    6. Creating a classic Windows application with Windows Forms
      10m 31s
    7. Creating a dramatic Windows application with Windows Presentation Foundation (WPF)
      4m 41s
    8. Creating a WCF service
      9m 1s
    9. Using an existing WCF service
      6m 38s
    10. Navigation UI designs with the Document Outline view
      3m 41s
  8. 33m 18s
    1. Creating a data project with SQL Project
      6m 24s
    2. Clarifying the confusion on .NET Data
      3m 31s
    3. Using ADO.NET in your application
      6m 50s
    4. Creating typed datasets
      7m 55s
    5. Using the data binding tools
      8m 38s
  9. 30m 13s
    1. Debugging code
      9m 32s
    2. Working with the Watch and other debug windows
      7m 46s
    3. Other debugging techniques
      6m 50s
    4. IntelliTrace historical debugging in Visual Studio Ultimate
      6m 5s
  10. 17m 56s
    1. Understanding Visual Studio editions and test tools
      2m 22s
    2. Verifying your code with unit tests
      8m 58s
    3. Running performance and load tests
      6m 36s
  11. 34m 5s
    1. Building your application
      4m 19s
    2. Customizing the build process with MSBuild
      6m 36s
    3. Setting assembly information
      2m 12s
    4. Deploying a basic Windows application
      2m 19s
    5. Creating an installer with Visual Studio
      7m 39s
    6. Creating a ClickOnce application
      5m 13s
    7. Setting up IIS for deploy
      2m 9s
    8. Deploying a Silverlight or ASP.NET application
      3m 38s
  12. 14m 0s
    1. Understanding source control
      2m 9s
    2. Setting up Team Foundation Server source control
      3m 5s
    3. Using Team Foundation Server source control
      8m 46s
  13. 17m 31s
    1. Understanding the .NET Office integration
      4m 16s
    2. Making a Word 2010 application
      7m 54s
    3. Making an Excel 2010 add-in
      5m 21s
  14. 31m 34s
    1. Understanding the extensibility model in Visual Studio
      2m 17s
    2. Adding external tools to the Tools menu
      4m 42s
    3. Creating macros
      7m 16s
    4. Using the Extension Manager
      5m 1s
    5. Creating an MEF add-in
      7m 9s
    6. Deploying and installing an add-in with VSIX
      5m 9s
  15. 25m 34s
    1. Working with configuration files
      5m 37s
    2. Using the Settings Editor
      7m 30s
    3. Using the Resources Editor
      6m 59s
    4. Localizing your resources
      5m 28s
  16. 1m 17s
    1. Goodbye
      1m 17s

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