Loading project, strange long inactivity.
i come to this discussion: https://forum.kde.org/viewtopic.php?f=265&t=174816 and i loaded a project looking at performance manager... (on Windows) and seems that there is a strange long time without any kind of activity (or maybe a single thread spanned on 16 threads con be identified as a 6% of cpu activity)
the project loaded is a 1.08 mbytes of size and consist in 75 clips of various type... titles/images/videos.