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Dylan wrote:

frog = 10 + 20 + 30 + 40 + 50 + 60

Are 6 "value" objects created here and not deleted until the garbage
collector runs?


No


frog = Vector{ 10, 20, 30 } + Vector{ 20, 30, 40 } + Vector{ 30, 40, 50 }

Are 3 Vector userdata (or table) objects created and not deleted until the
garbage collector runs?


Yes-- both userdata and table garbage is being generated there.
Your fear is valid. An incremental GC is the #1 thing Lua needs. It's being worked on. 



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