We are using a custom-build OData-Service to fill our Dashboards with life. However, as our databases grow, refreshing can take a long time, in some cases up to an hour. This is due to the fact that refreshing fetches all the data from all the connected OData-Feeds every time, which can be hugely annoying when you are still building the dashboard and have to wait for the refresh.
This blogpost outlined a possible implementation for Reference-Caching which would, at least in our case, alleviate the problem, as a lot of Data doesn't actually change (much) over time. However, it seems that this was never actually included in the OData-Specs. Can somebody clarify the current state of things or in lieu propose a different solution to improving the performance of large, semi-static OData-Feeds in Power BI?