Thank you.
Sincerely,
Craptop user
All work I do is tested on crappy low-powered computer because that is what I use to do work. If it is not fast on these underpowered computers, then it is not usable (for me). That means on anything better than a craptop, generally, performance can only improve. Similar principle applies with shell scripts. I prefer to use the ("crappy") scripting shell as the interactive shell. That means scripts generally run fast under all conditions and I never have to worry about scripts not working due to use of interactive shell, e.g., Bash, features.
Target the lowest common denominator. That's how I work. No overpowereed workstation with multiple monitors, or expensive "developer" laptop.