Below is a snippet of a basic script I created. The intent was to time how long it takes from the right click till a image appears on the screen. Running this manually at the SUT it takes about a second. Using Eggplant I have gotten results that range from 2.2 seconds to 4.0 seconds. Out of roughly 30 runs it has returned the expected 1 second timing twice. Any ideas? I have made the image being searched for only a few pixels large. The SUT has RealVNC installed and both RealVNC and Eggplant have the preferences defaulted to out of the box settings.
setoption searchrectangle, ((5,180,70,230)) put the time into StartTime RightClick "friendly symbol" setoption searchrectangle, ((190,160,275,225)) WaitFor 10, "friendly_on_cursit" put the time - StartTime into TotalTime