IgorB,

Thank you for testing and documenting your results. Did you test the new AppImage first and then the old Appimage? The faster time on the old AppImage may have been due to some of the video file/rendering still being in memory. Were both cases tested with AppImages? Do you get the same results if you test the old AppImage first and then the new? Or the results could be because of the increased size of the new AppImage versus the old; the upgraded library packages; or something else!

I did some rendering test on an old project of mine using
"CinGG-20241231-alternative_shortcuts.AppImage"; only 10 secs by
selection (highlight) in Timeline.
Render setup: vp9_1280x270_24or24or50fps.webm
- Info by terminal says: 300 frames 94.918 secs 3.161 fps; File Size
1.6MB
An old Cin version, same setup,...
- Info by terminal says: 300 frames 83.582 secs 3.589 fps; File Size
1.5MB

I think, it is strange that rendering of an old version of CinGG is
slightly faster than a new one. Is it, probably, due to the old Laptop
and old Operating System that adapts better?

IgorBeg