Are there any risks or disadvantages to building software from source, compared to installing a package? Can it mess with my system in any way?
I usually avoid it because I’ve found it to be a faff and often doesn’t work anyway but in a couple of cases it has been necessary.
As far as I can see, this comparison always uses the ‘native’ target. So you can’t even compare a generic LTO build with a native (non LTO) build from this.