[jdk22u] RFR: 8330523: Reduce runtime and improve efficiency of KeepAliveTest

Wed May 1 17:48:05 UTC 2024

Hi all,

This pull request contains a backport of [JDK-8330523](https://bugs.openjdk.org/browse/JDK-8330523), commit [16c7dcdb](https://github.com/openjdk/jdk/commit/16c7dcdb04a7c220684a20eb4a0da4505ae03813) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Christoph Langer on 27 Apr 2024 and was reviewed by Daniel Jeliński.

Thanks!

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Commit messages:
 - Backport 16c7dcdb04a7c220684a20eb4a0da4505ae03813

Changes: https://git.openjdk.org/jdk22u/pull/177/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk22u&pr=177&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330523
  Stats: 1230 lines in 1 file changed: 75 ins; 1012 del; 143 mod
  Patch: https://git.openjdk.org/jdk22u/pull/177.diff
  Fetch: git fetch https://git.openjdk.org/jdk22u.git pull/177/head:pull/177

PR: https://git.openjdk.org/jdk22u/pull/177