[issue39434] Remove unnecessary logic of float __floordiv__

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:

Thanks, that's a nice optimization!

I'm surprised that creating a tuple of 2 items, get one item  directly into the C structure, and destroy the tuple is so slow (360 ns => 185 ns: 175 ns less). With my FASTCALL optimization on function calls, I recall that avoiding the creation a tuple of N items made function calls around 20 ns faster. Not 175 ns.

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