RFR: 8300184: Optimize ResourceHashtableBase::iterate_all using _number_of_entries [v2]

[David Holmes]

On Tue, 17 Jan 2023 07:18:19 GMT, Xin Liu <xliu at openjdk.org> wrote:

> That's why I claim to optimize iterate_all rather than iterate.

A call to `iterate` can result in iterating all elements if the lambda does not find an element to trigger iteration to cease; in which case this optimisation also applies.

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PR: https://git.openjdk.org/jdk/pull/12016