Marcel wrote: > Looks like the Windows 10 drivers are not optimized for 2D anymore. > This trend has been going on for years, they only optimize for 3D > performance these days. QPC2 uses the DirectDraw 3 API, which was > available starting with Windows 95 and at least still works on Windows 10, > albeit with reduced performance it seems. I expected that it is something in that area.
> One could rewrite the screen driver for a newer API, but then who cares if > the QL is 900 or 1200 times faster than the original, other than in artificial > benchmarks you will hardly notice it. Maybe no need for a rewrite but for a tweak. Why? Did you notice that the slow graphics are not constantly slow? Watch those 20 seconds of Photo QL again https://www.youtube.com/watch?v=O4xwT65cLU0#t=2m9s and you'll see that when picking another QL window then the graphics are fast again. If it would be consistent (slow or fast) then I would not argue. And as said, not all machines running Windows 10 have this problem. I still do not have a clear pattern but it looks like more recent machines (Intel Haswell or Skylake platforms with i*-4xxx or i*-6xxx CPUs) are affected. I've seen a Sandy Bridge Machine (i5-2xxx CPU) which runs QL graphics at rocket speed, even under Windows 10. Can some other QLers please step in and report how their upgraded (or new) Windows 10 machines are performing QL graphics wise compared to the time before the upgrade? Urs http://www.sinclairql.net/ _______________________________________________ QL-Users Mailing List
