Soller: Real hardware breakthroughs, and focusing on rustc

Well, of course it deduplicates more. That's one of LTO main advantage. But overall, this kind of gain is to be expected. With such a good overview of what can and cannot be executed, you can dead-code-elliminate down to the `if` themselves. Then simplify the code further. In that specific case, it was pulling half of Qt and KF5. Yet, it didn't *really* use much of that. In most case, the module/kf5-frameworks were pulled indirectly by each other for a single class/function, which wasn't even relevant to the part of the library I was actually using. This isn't just common. With high level softwares, this is pretty much unavoidable. The Gnome stack isn't different. However, I think LTO has less effect on it because the runtime gobject-introspection will (maybe?) keep some dead code alive. With Python, it is absurdly full of dead code and there is no way around it.