One of the selling points of this post is that bash is slow to start. But how fast is bun shell? Have anyone compared bash and bun shell start times?
But common stuff like zsh with oh-my-zsh is known to be rather slow, as in several hundred millisec to start.
Depending on you, of course, that might be considered fast. I consider it insanely slow.
My shell of preference, "nushell":
> Startup Time: 24ms 448µs 147ns
Ideally it would launch in < 16ms (1 frame at 60hz), but I can live with this ;-)
So your parent discussed interactive shell, and I assumed you did, since you didn't state otherwise.
Nobody is talking about the startup time of interactive shells.