Top Scripts Questions

Hi Scripters, I have a question about top scripts and how they work. Can anyone explain to me why they can change, sometimes within moments? I have a resident with a pair of fluttering birds. They flutter all the time, constant motion. The script load on the sim shoots up on the top scripts when these birds are out. But sometimes, they show as less, then within a few minutes, they'll shoot up. Noticed this phenomenon also with the avatar scripts that show on top scripts. One person on the sim was showing a very high script; she (being interested in this, herself) took everything off and then put the same things back on and it then showed much lower. Any ideas or explanation why this happens? Mostly, I'd just like to have a better understanding of how it works. Thanks!

Treasure

It is a snap shot in time or a slice of time taken while the script is working, not the start to end processing of the script. This "slice of time" changes depending on exactly what the script is doing at that point.