@MaMikee Or this one
two thoughts auto boot retropie into a game or into a slideshow
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@mitu

Yes, I did what you said and I succeeded to lower boot time to 11 seconds for libretro emulator but only through autostart.sh.
However, non-libretro emulators still starts about 5 seconds faster through the rc.local script and I dont know what else I could do here.
It seems runcommand is a problem, because for some reason it refuses to start through rc.local properly...

Glad it can be helpful for others!

@kevin-b Go to this article to scroll down to United Kingdom then match up that key with your us keyboard - should be near your enter key - https://en.m.wikipedia.org/wiki/QWERTY#United_Kingdom its the Tilda I think.

What do you mean when you pick an emulator. You usually pick an emulator after selecting a rom. Do you mean when selecting the system it automatically opens a rom?

Sorry. My mistake. This is why it's confusing when people add to other posts. I believe it's the case issue as @meleu has said.

Oh - Also in the other thread it was mentioned that your command line is wrong. Retropie should be RetroPie. Case sensitive.

See https://retropie.org.uk/forum/topic/5307/command-line-command-works-but-doesn-t-work-if-i-put-it-into-a-script