Concatenation of tables in Lua

Question

ORIGINAL POST

Given that there is no built in function in Lua, I am in search of a function that allows me to append tables together. I have google

Answer 1

And one more way:

for _,v in ipairs(t2) do 
    table.insert(t1, v)
end

It seems to me the most readable one - it iterates over the 2nd table and appends its values to the 1st one, end of story. Curious how it fares in speed to the explicit indexing [] above