[issue43198] One operation on sets < 1/100th as efficient in 3.9 than before

[Raymond Hettinger]

Raymond Hettinger <raymond.hettinger at gmail.com> added the comment:


New changeset 72789592a3491bab49f144bb292679b1484885d9 by Raymond Hettinger in branch 'master':
bpo-43198:  Revert 3dd2157 that removed freeslot tracking. (#25010)
https://github.com/python/cpython/commit/72789592a3491bab49f144bb292679b1484885d9


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<https://bugs.python.org/issue43198>
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