"execute as" command execution order

just a quick question since i didn't find anything on the wiki:
In what order does "execute as [targets] run function [function]" run the functions? Are they executed simultaneously or first one then the next?
I read through this: https://minecraft.wiki/w/Commands/execute#Subcommands_and_forking, but in my understanding it only the order in which the subcommands are run and not the order of the commands at the end, but maybe i'm not understanding everything correctly.