I've got, since forever, an advanced Bash prompt. But I also don't want my Bash prompt to have any visible delay. So back in the days I came up with time outs w

I've got, since forever, an advanced Bash prompt. But I also don't want my Bash prompt to have any visible delay. So back in the days I came up with time outs working with milliseconds (which, AFAIR, isn't the case for the timeout command whose granularity is seconds at best?). It involved processes and killing etc. but it got me what I wanted: either an instant prompt with all the infos I want of an instant prompt which may miss one or two infos. I much prefer that to the "my prompt contains no information because that's quicker". Been working flawlessly since 20 years: so flawlessly that I don't remember how it works.