Load scripts are used to program the behavior of simulated users in a load test. Apart from native functionality of the Lua language, load script programmers can also use Load Impact’s load script APIs to write their advanced load scripts.
Now you can script your user scenarios in the simple but powerful language Lua, using our programmer friendly IDE and new APIs such as: JSON and XML parsing, HTML form handling, Bit-fiddling, and more.
Load Impact Blog 