Re: Parsing varargs to a function

On 2026-04-27 22:57, Lars Müller wrote:
> Personally I would have preferred a (peephole-ish) optimization that makes
> "x = select(i, ...)" constant time, as found in LuaJIT.
> Then the "select"-loop would be fine as idiomatic vararg iteration
> construct.
> (In its current state, it runs in quadratic time on PUC Lua, as varargs
> with (average) linear length are copied on the stack in every invocation.
> For older versions of PUC Lua, I thus recommend iterating tables by first
> packing them up using table.pack and then iterating up to t.n instead.)
Hello Lars,

I don't care about performance of PacMan's bait "...".

I use "..." mostly to wrap results of function passed as argument.
So there is unlikely be 20 M values from function. And O(N)
get_by_index(index, ...) is okay.

-- Martin

-- 
You received this message because you are subscribed to the Google Groups "lua-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].
To view this discussion visit https://groups.google.com/d/msgid/lua-l/5e68c2c2-aa8d-4f01-b67b-65d8332b3246%40disroot.org.