8343188: Investigate ways to simplify MemorySegment::ofBuffer

[minborg]

This PR proposes to improve MemorySegment::ofBuffer making it more amenable to inlining and generally improving performance.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8343188: Investigate ways to simplify MemorySegment::ofBuffer (Enhancement - P4)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jdk.git pull/21764/head:pull/21764
$ git checkout pull/21764

Update a local copy of the PR:
$ git checkout pull/21764
$ git pull https://git.openjdk.org/jdk.git pull/21764/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 21764

View PR using the GUI difftool:
$ git pr show -t 21764

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jdk/pull/21764.diff

[bridgekeeper]

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[openjdk]

❗ This change is not yet ready to be integrated.
See the Progress checklist in the description for automated requirements.

[openjdk]

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• core-libs

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