Testing Performance of an Application using NeoLoad!

Nowadays, most, software applications are written as web-based applications to be run in an Internet browser. Software testing provides key contributions in making sure the user experience and expectations are met to the highest level. The software industry is currently going through a highly competitive phase as Darwin says-“Survival of the fittest”; this is what will be noticed in this industry too.

In order to survive the competition, capabilities and incapabilities of a software application need to be tested. This includes testing for functionality, usability and compatibility of the application across the environments it is used on. Along with this, a very important aspect is Performance Testing.

Performance testing is a type of non-functional testing which is mostly recommended for business to business, business to customer applications. Performance testing can be categorized into load, stress, volume testing etc.

Common questions asked are like,

  • Will our application handle load or, will it fall apart under load?
  • How many users can our application handle, simultaneously?
  • At what point does the server crash?

Performance testing may answer the above questions. The cause of performance related issues varies with architecture and configuration of the application. Poor software, network configuration, poorly optimized software code, hardware configuration etc. are some of the common reasons for performance degradations. One of the best and emerging tools available to identify ‘performance issue’ in the market is NeoLoad.


NeoLoad was introduced by “Neotys” as a performance testing solution for the web and mobile applications. NeoLoad becomes popular with its simplicity in usage and easiness in analyzing reports. It allows, tracking statistics of the application infrastructures such as OS, database and networks, along with the usual response time.

Recording scenarios and analyzing its result in NeoLoad is just a 3 step process:-


1) Download and install NeoLoad (for windows) from the Neotys website download from here.

1.1) Install the downloaded exe file to your system.


Designing Test Scenario

1) Open NeoLoad and create a project.

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1.1) Select “New Project option”. N3

1.2) Enter the project name and Click Finish, NeoLoad design UI will appear.

Neoland project

Design page contains three sections:

  • Virtual Users– NeoLoad records the scenarios under virtual user section, for the free version user can create upto 50 virtual users. To know more about virtual users click here.
  • Populations– Populations are a group of virtual users, mainly used for monitoring the application behavior in different ways. Eg: e-com application can be tested by simulating 60% of users browsing the site, 40% making transactions under different browsers. To know more about populations click here.
  • Monitors– NeoLoad support monitoring of OS, Networks, Databases, Web/EJB Tier etc. Adding and configuring monitoring machines are allowed through monitors tab. For more details click here.

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1.3) Recording with NeoLoad – virtual users can be created automatically by clicking start recording button.

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To know more about Virtual User profile settings click here

After clicking ‘OK’ button NeoLoad Container will open along with the selected browser window.

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  • Open the application and enter the Container name in the provided text box. In the above example, ‘google.com’ is the test site and container name given is “Searching NeoLoad”. Based on the actions, the user can change the container name by just renaming the existing name- rest of the actions will be recorded under new container name. Reference video of NeoLoad recording is here.
  • The recorded scenario will be listed under virtual user profile containers as shown below.
  • User can apply conditions and loops just by dragging from the actions menu. The selected request can be edited from the right-hand side.

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Running and Analyzing Result

1) For running the recorded scenario a population should be created from the population tab.

  • Go to populations
  • Click on ‘+’ button, enter the name and click OK to save.

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  • In our example, we created only one virtual user, so that user scenarios are running by giving 100% population. To know more about configuring populations click here

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  • After creating the population, assign that population to the runtime scenario.
  • The settings required to run the load test are defined under this scenario page.
  • To know more about settings in scenario page click here
  • After configuring scenario page, the load test scenarios can be run by clicking the play button.

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  • After running the scenario a report will be generated.
  • The generated report can be exported to PDF, HTML, XML and Word formats.
    • Select “Tools” from ‘Test Summary’ page
    • Then select “Generate Reports” from “Tools” menu
    • Then select the report type
    • Then customize the report contents
    • From output options page, select the output format and click Finish to generate the report.
    • The generated report can be compared with a predefined set of values using SLA’s.

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SLA (Service Layer Agreements): It allows the user to set a baseline for performance statistics. By applying SLA user can compare the values in generated report with a predefined set of values. To know more about SLA’s click here.

To know how to apply SLA profile to the generated report click here.

Neotys provides a wide range of support to their product NeoLoad through their blogs, websites and communities.


  • To get your questions answered post it here.
  • Technical publication is here.
  • To read more about performance testing click here.
  • Tool comparison can be found here.
  • To know more about training from Neotys click here.
  • Expert reviews can be found here and here.

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