RFR: 8294712: G1: Use index-base iteration for G1FlushHumongousCandidateRemSets

[Albert Mingkun Yang]

On Mon, 3 Oct 2022 11:20:06 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple change of reducing the fast-path cost in `G1FlushHumongousCandidateRemSets`.
> 
> Test: hotspot_gc

Thanks for the review.

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PR: https://git.openjdk.org/jdk/pull/10531