RFR: 8288425: Footprint regression due MH creation when initializing StringConcatFactory

[Mandy Chung]

On Tue, 14 Jun 2022 15:16:27 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> Avoid doing MH creation when initializing `StringConcatFactory` by lazily initializing to a `@Stable` field instead.

Marked as reviewed by mchung (Reviewer).

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PR: https://git.openjdk.org/jdk/pull/9154