RFR: 8341481: [perf] vframeStreamCommon constructor may be optimized [v2]

[Vladimir Ivanov]

On Fri, 13 Dec 2024 02:17:33 GMT, Vladimir Ivanov <vaivanov at openjdk.org> wrote:

>> Optimize constructor to skip extra copy for registers. The tier1 tests are OK. The Specjvm2008 benchmark reports ~1% improvement.
>
> Vladimir Ivanov has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
> 
>  - Merge branch 'openjdk:master' into 8341481
>  - 8341481: [perf] vframeStreamCommon constructor may be optimized
>  - 8341481 [Perf] vframeStreamCommon constructor may be optimized

For the Xeon(R) 6972P scores for the specjvm::serial for current mainline looks as:
orig: 1T - 133.38 ops/m, 192T - 8950.13 ops/m
patched: 1T - 137.85 ops/m; 192T - 9745.03 ops/m

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PR Comment: https://git.openjdk.org/jdk/pull/22173#issuecomment-2546435208