the update.img @ 5GB doesnt take long - ~5min?
From start to finish for me - ~1hour. But I have fast internet and a local repo!. That is the delay for me.
compiling u-boot - 1min
Kernel <15 mins.
Of course - if you run my script the way it is configured you do not need to repeat some of that.
If you do not reconfigure uboot or kernel - then it will just reuse the previously built one. (say no to rebuild these when asked in 123.)
the creating rootfs and installing the ubu-base and kernel{modules} - 1 min.
All the delay is in your internet speed and the update of the rootfs chroot jail.
- And if you get that to work correctly the first time, you can make a copy of the rootfs image as a backup. Then use the X script to remount it and play some more.
If you make a mess of it, use your backup!