I dont have parallel boot enabled as well as it is disabled by default. Looking at this Systemd post triggered this thought to experiment with it one weekend. I have this laptop where I run Gentoo like a control freak. There is nothing in it other than the core system running as openrc services. So, I might play around adding readiness gates to those and see if anything at all can be parallelized.
reply> ... Linux boot time is so much shorter than whatever the BIOS does before it hands control over
replyOn which system? Is your machine, for whatever reason, re-doing "memory training" everytime it boots? This is one can be really slow.
Who knows, but any desktop and laptop I had access to in the last decade spent more time in POST or whatever than it does in OpenRC. Might be more of a case of the Linux bootup with a minimal set of services I actually need already being pretty fast even without paralellism rather than those BIOS being particularly slow. Windows for example is a lot slower there from my experience - and the difference is even more ridiculous for shutdown.
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