Hello,
I tried to playback an 4k ProRes Mov File. It did run with 5.8fps on a Pentium 3.5GHZ / AMD 280X gfx / R5.1Arena
It didn´t speed up when deactivating the preview for the played movie by clicking on an empty field.
It did speed up when I activated the preview for another file with FullHD resolution though, from 5.8FPS to 7.9FPS
-> No preview or preview of the same file, thus decreasing load while playback-> slow
-> preview of a file with smaller resolution, increasing total system load -> fast
Weird.
