On Mon, Jan 17, 2022 at 08:04:50PM +0900, Inada Naoki wrote:
> Name lookup is faster than building set in most case.
> So I don't think cost to look name up is important at all.
But the cost to look up the name is *in addition* to building the set.
If you saw this code in a review:
t = tuple([1, 2, 3, 4, 5])
would you say "that is okay, because the name lookup is smaller than the
cost of building the list"?
I wouldn't. I would change the code to `(1, 2, 3, 4, 5)`.
> Proposed literal might have significant efficiency benefit only when:
>
> * It is used in the function scope. and,
> * It can not be optimized by the compiler now.
Sometimes, now, the compiler *pessimizes* the construction of the frozen
set. See b.p.o #46393.
--
Steve
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