Can anyone measure boot timing?

#1

Hello everyone,
I’m wondering what is the approximate timing from power-on to desktop, using a Debian / Ubuntu out of the box?
Just in case, did anyone tried to optimize that and push it to the limit?

I ask so, because I’m considering a sort of embedded Kiosk-like application, where boot time matters.

Thanks in advance!

#2

Under what condition? Which drive? Sd? Emmc? Nvme? With what utility you prefer to test it? Or you are okay with stopwatch?

#3

I would do it like that:

  1. put time in file following a reboot command
  2. put time in file executing /etc/rc.local
  3. compare the files
#4

For my need a stopwatch is fair enough.
SD or eMMC: nvme would be a plus!

#5

For me, with my solution, it is 18 seconds - eMMC, Ubuntu. From reboot command till end of rc.local.

#6

Thank you very much!