Comments by "Juzu Juzu" (@juzujuzu4555) on "If DT Made His Own OS, Things Would Be Radically Different!" video.

If I were to create my OS, I would make Gentoo that has LTO overlay on default. I would love to have all ebuilds have their best optimization flags with them, nothing crazy, but let the compiler use all the possible optimizations that it figures out to be worthwhile to use. Sure getting the best flags is far from trivial problem, but somebody should do it. Now having my Gentoo compiled with Graphite, LTO, etc. and O3 (and Ofast on selected packages) I really can see the difference. That's one plus having old dual core laptop, you can feel the improvements.
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@Peter Andrijeczko Most packages that need specific optimization levels have those configured in the ebuilds. So you don't have to worry about that for the most part. I have GentooLTO overlay and use ~amd64 testing branch, and I use LTO, Graphite loop optimizations and couple of other optimizations that allow the compiler to choose what to do. Those are all default in the GentooLTO overlay. Only twice I have had to disable LTO and Graphite, and most likely it's due using testing branch. The only problem is that compile times are much longer, so with low spec laptops you really need to have distcc server in reality. At least with testing branch that publish updates multiple times more than stable. Google GentooLTO and check it out.
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@Peter Andrijeczko I had heard about GentooLTO before seeing it on Mental Outlaw's video, but his video made me finally check it out. I truly love it, performance is great, though it was great anyway because it's Gentoo after all, but now it was faster still and optimization is in my blood. Shout out to Mental Outlaw, whoever sees this, go and subscribe to his channel.
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