I\'ve started using SOAP UI recently to test web services and it\'s pretty cool, but it\'s a huge resource hog.
Is there any way to reduce the amount of resources it use
We test our SOAP APIs manually with SOAP UI and otherwise use jMeter for automated SOAP API testing. While having a GUI seems attractive first, I find both applications quiet user-unfriendly and time consuming to work with.
As already suggested, you could do it in code using Java or maybe use a dynamic language like Ruby:
Testing SOAP Webservices with RSpec
SOAP web Services testing in RUBY