How to measure the Dolphin launch time?

[fabio.dellaria]

I continue to have some annoying lags launching Dolphin from X11 (on Wayland it’s all OK), so I’m looking for a method (valid on X11 and Wayland) to can measure the Dolphin Launch time. Just to can measure how my fixes influences the lags.

Hardware: AMD Ryzen 5 2600X - 16 Gb RAM - SSD 500 Gb (Samsung) - Nvidia RTX 2600 -3 Monitors (1920x1200)
OS: CachyOS (Arch Based), KDE 6.3 (same problem on KDE 6.2)

[meven]

@fabio.dellaria

I continue to have some annoying lags launching Dolphin from X11 (on Wayland it’s all OK), so I’m looking for a method (valid on X11 and Wayland) to can measure the Dolphin Launch time. Just to can measure how my fixes influences the lags.

You can use hotspot with debug symbols (using debuginfod enabled) and enable perf to work.
This will gives you a very telling flamegraph.

X11 is slower to start any program by design (it is synchronous) and as a Dolphin maintainer, I did investigate this in the past. I can’t remember the specific it has been a while.