Are you able to assist? You can grab the
perf.datafrom 486956 – Dolphin takes ≥5s to load ≥52 GiB, 7x10^3-file directory., if that’s of use.
The perf.data is specific to your distro can’t be exported unfortunately only to the same distro with the same exact packages.
I am interested in the “Flame Graph” tab mostly. It will tell what was dolphin doing.
It does require debug symbols, it seems you have them or at least a bunch.
Since you are using fedora 40, you can simply once launch gdb dolphin and it will download them for you: type once c, wait a bunch during download and once dolphin opens you can close it, the debug symbols are downloaded.
At least we can see the dolphin main-thread very busy, that would make it unresponsive in the Time line".