RFR: 8372950: Pem.pemEncoded should cache the Pattern

[Anthony Scarpino]

On Thu, 4 Dec 2025 17:13:13 GMT, Fernando Guallini <fguallini at openjdk.org> wrote:

> PEM is using the String.replaceAll() method that creates a Pattern internally every time. This looks like a minor inefficiency and since it is caching Patterns for other cases, it should do the same here.

Sorry for the delay, I just noticed your PR.  I have tested the changes and reviewed the code.

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Marked as reviewed by ascarpino (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/28661#pullrequestreview-3605964192