[jdk24] RFR: 8349183: [BACKOUT] Optimization for StringBuilder append boolean & null

[Chen Liang]

On Mon, 3 Feb 2025 18:41:44 GMT, Jaikiran Pai <jpai at openjdk.org> wrote:

> Can I please get a review of this backport of https://github.com/openjdk/jdk/pull/23420 into jdk24?
> 
> This proposes to bring in those same backouts into `jdk24` to prevent the issue noted in that PR description. jdk24 is in rampdown and this backport will require an approval. A approval request has been raised in https://bugs.openjdk.org/browse/JDK-8349183?focusedId=14746841&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-14746841.
> 
> This backport into jdk24 wasn't clean due to a trivial merge conflict in `StringLatin1.java` file. That merge conflict was manually resolved (just like it was done against mainline). The git commands used to create this backport against jdk24 branch are:
> 
> 
> <checkout fresh jdk24 branch>
> git cherry-pick --no-commit 618c5eb27b4c719afd577b690e6bcb21a45fcb0d
> <resolve merge conflict in StringLatin1.java>
> git commit -m 'Backport 618c5eb27b4c719afd577b690e6bcb21a45fcb0d'
> 
> 
> tier1, tier2 and tier3 testing is currently in progress with this change.

Marked as reviewed by liach (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/23425#pullrequestreview-2593574823