Comment 16 for bug 1698282

It appears we've reached a milestone today: totem's CPU usage is no longer significantly higher than gst-play-1.0 --videosink=clutterautovideosink (or glimagesink)

If you compare it to mpv though, totem is 2-3 times heavier still. However profiling totem and gst-play-1.0 today seems to suggest that is due to:
  (a) Lack of DMA-buf support in clutter-gst (https://bugzilla.gnome.org/show_bug.cgi?id=759209)
  (b) General complexity of GStreamer

I think the remaining piece here is to get (a) fixed. However before that will ever work for us, apparently gstreamer-vaapi needs additional fixing so that it does not conflict with the patch we're using for Ubuntu right now: https://bugzilla.gnome.org/show_bug.cgi?id=784369#c12

It sounds like this remaining piece (a) is in progress with upstream. And (b) doesn't look as significant or like a realistically solvable problem any time soon. So I think I'm done here, unless I can help upstream with (a)...