RFR: 8300487: Store cardinality as a field in BitSet

[Simon Tooke]

On Wed, 11 Jan 2023 16:02:40 GMT, Sergey Kuksenko <skuksenko at openjdk.org> wrote:

> It would be better to see benchmark results other than cardinality operation. To understand how big performance regression is.

Agreed - I suspect this is adding unnecessary overhead to the most common uses of BitSet; I'd be tempted to roll my own if this went in.  Benchmarks could add some level of comfort.

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PR: https://git.openjdk.org/jdk/pull/11837