If there a re really short spikes in the GPU usage you wont be able to see those in any statistics. In any case completely off topic for this thread.
Well I can only really go by the statistics and if they're not showing high GPU usage it seems a leap to assume that's the problem.
Anyway, if the problem of the render time shooting up when MP lost focus (not even scrolling in the browser) isn't anything to do with dshowhelper, what is it to do with?
Probably with the fact that you are running on a dual monitor setup.
Which MP supposedly supports by allowing the user to set which screen it runs on.
As I explained in post 1404 https://forum.team-mediaportal.com/...ty-development-81148/index141.html#post820880 MPC-HC doesn't appear to have any problems in dual-screen and considering that dshowhelperv88 makes dual-screen work a lot better compared to the default dshowhelper, surely this points to an issue with dshowhelper no?