What's on the "ur device can't be trusted" screen?

[fuuuu.ind]

Hello
Newbie here

So I've been wondering, what's actually happening on the "ur device can't be trusted screen" on unlocked bootloader device. Is it just a message with delay period? Does it do essential boot up on the back ground? Can I perhaps turn it off and speed up booting process?

Been very curious since it says " your device will start after 5 seconds". I mean, how could they know it took 5 seconds? What if it could be changed to 0s?

 

[sensi277]

It's a delay counter. It replaces the default initial (non-animated) boot screen, so it might also be longer than 5 seconds.

 

[thichthat]

It is just a delayed message. Trust me, the linux kernel can boot up insanely fast on g5s plus's hardware.
Custom ROMs cannot change this delay because it is coded into bootloader, which is very difficult to modify.