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Desktop compositing latency is real

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Re: Desktop compositing latency is real

#2
Is this something related to the latest Windows 10 updates or it was always the case? I mentioned this because, may be unrelated, there are some slow drawings in the UI after the October major update. I can notice this when I login and the desktop is drawn.

Re: Desktop compositing latency is real

#5
post #2

Is this something related to the latest Windows 10 updates or it was always the case? I mentioned this because, may be unrelated, there are some slow drawings in the UI after the October major update. I can notice this when I login and the desktop is drawn.

always like this for win10

Re: Desktop compositing latency is real

#7
I recently measured it with my phone's camera in slow motion mode. The system is an AMD Ryzen 1800X with AMD R9 280x GPU, KDE Plasma with KWin window manager in compositing mode. Key press to screen output latency was ~33 millseconds (90 fps recording, so increments of 11) in KWrite. The computer feels plenty responsive with that latency, and I hate latency...

It is a full stack real world result - for comparison purposes it makes sense to measure only the software as in the article, but in reality you want to optimize everything. Especially screens can be quite bad - tens of milliseconds, up to 100 in the worst. USB lag is usually quite low - when I measured it once for low-latency serial comm it was usually < 2 ms.

Re: Desktop compositing latency is real

#8
post #6

> Don’t you find it a bit funny that Windows 95 is actually snappier than Windows 10? Comparing them on the same hardware?

not a problem, let's find some p2 boxes on ebay.

ps: every time I boot an old desktop I always have this feeling. The new stacks are amazing, they do it all, but .. I love the immediate feeling of the old ones, even at some cost. And this comes from a compositing fetishist.

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