I published a site on Azure and have something odd. Sometimes the pages take about 3 seconds to load (only the document not css or images).

However then that page is snappy on reloads (consistently around 100ms).

I talked to a collegue in another city and then we had that the first of us to browse to a certain page would get a 3+s load time, the other person would get the normal 100ms.

Then that page would be fast continuously. This happened once per page. We have something to keep the app pool going (several solutions actually).

If we manually stop the service and start it again we got again many slow pages (not just initial slowness due to starting app pool).

We tried emptying everything in App_Data and it made no difference in speed.

So in summary... Sometimes when the page has been alone for a while (but without app pool shutting down) many pages are slow to load, but then after loaded once they are fast.

What could do this?