>Maybe some other process is consuming CPU cycles, check with procmon or something similar.

Thanks, I will check for that.

But, I will have to send a temporary version of the framework to add additional tracing temporary between the point the hit is logged and the Page_Unload() event. My perception is that whatever is done at first works immediately but ASP.NET does not want to let it through the Page_Unload() event for several minutes.