LoadUI is a free and open source load testing tool that allows you to do complex load tests and test the performance by simply dragging the different components around. LoadUI consist of building blocks called Components that you drag from the Component Toolbar to the Project you’re working on. Moreover, these components are connected by wires and what’s more there’s no limit for how many components that you can create and connect. Following are pro tips of loadUI:
1. Let a manager test
2. It’s interactive, use it
LoadUI is highly interactive and configurable in real-time, so take advantage of that.
3. Record your tests
Reproducing the tests is difficult as loadUI is too interactive. Hence, using a screen recorder to be able to replay your tests and see what caused the service to crash.
4. Work sturctured
LoadUI has support for test cases.
5. Don’t double-work
If you have created functional tests in soapUI, you can simply run these in loadUI with the soapUI component.
6. Write your own component
LoadUI is open-source, which means you can write your own components, in Groovy, if you wish.
Source: http://www.softwaretestinghelp.com/load-testing-using-loadui/
