LuaJIT string concat

Hi list,

I am looking for the fastest executing way to create something JSON-like in native Lua run by LuaJIT.

This seems to be like the atomic operation for it

'[' .. table.concat(t, ',') .. ']'

does a subtler approach come to mind for anybody, e.g. drawing more explicitly from LuaJIT's strengths?

Thanks a lot,
Henning