>>luke2m+(OP)
> a free open-source operating system written entirely in Assembly. The operating system weighs only about 3MB and will boot in less than 3 seconds even inside a virtual machine.
And it really is less than 3 seconds straight to desktop UI and ready to use immediately, incredible.
>>fouc+0g
I have a laptop with NVMe on which if I setup Win10 to boot without password prompt and no BIOS test, I can have a working desktop from cold start under 2 seconds. I actually hate that kind of speed since if I want to change something in BIOS / have different startup (like OS recovery prompt for example) my F2 / Del / F8 pressing has a lot of misses.
Nowadays startup under 10 seconds is more of a hinder than a gain. My 2 cents
>>unnoui+eB
It is not a cold start. Actually, the fast start feature of Windows 10 allowed this feat. But in essential, it is just restoring a working session to the RAM.