Hello there :)
Here is how I compiled Godot :
scons -j8 plateform=linuxbsd use_lto=yes target=release_debug
Except for pulseaudio every requirement are met.
My settings :
Kernel : 5.4.72
RAM : 12Go
CPU : Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
Graphic Card : NVIDIA GTX 1060 3Gb
Graphic Driver : x11-drivers/nvidia-drivers-455.28-r1
Window Manager : i3 (feh is running in background updating wallpaper every 5s)
Symptoms :
Launching Godot and creating / loading a fresh project looks good. But when I try to interact with UI, like sidebar or main basic menu in the top-left corner. Not only it freezes for a couples of seconds, but the entire system doesn't respond anymore. After a moment I can get back my hands on a tty and kill the process, tryharding with the binary in this state is just impossible.
The curious thing is that, on the other hand, the 3D viewport is very smooth and effective.
Thank you for your help and feel free to ask any details I forgot to add to this topic.