I have a few PI Vision dashboards that have alot of data on them, so it's not weird that they take a few seconds for the first DiffForData request to complete. However, I've noticed that if I navigate away from one of these dashboards then navigate back to it, the DiffForData loads almost instantly. I've also run into situations where I've caught PI Vision showing different data for an attribute at a given time than what PI Web API shows.
Now I'm curious... is there some sort of caching beyond what's cached in PI Web API (between Web API and the browser?). I've looked around on the browser side and didn't see anything there. Maybe an extra cache on the PI Vision server itself? Is that what's going on? If so, would it be possible to temporarily disable this caching for the sake of troubleshooting? Is there a way to clear this cache?