Is Zua a Lua variant the size of Zuo? I like the idea.

Going back to the Bash comparison, Bash is huge but the subset ash is pretty small, somewhat smaller than Zuo. Busybox’s AWK is, as I recall, about half the size of Zuo. We can have a POSIX compliant scripting setup (ash + AWK) using around the same amount of space Zuo takes up.

There's minilua (https://github.com/LuaJIT/LuaJIT/blob/v2.1/src/host/minilua....) which is used to build LuaJIT (dynasm, etc)