[issue23259] Remove dummy reuse optimization from sets

[Raymond Hettinger]

Raymond Hettinger added the comment:

I've observed the generated assembly has fewer instructions on the critical path and that a register was freed-up.  That's enough for me in this case (it's too easy to get trapped in local minimums in timing small changes like this).

Do either of you have a technical comment on the patch?  If it isn't broken or seriously misguided, I will likely apply it shortly.

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nosy: +tim.peters

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<http://bugs.python.org/issue23259>
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