Relates :
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Per Alan's request in [the PR](https://github.com/openjdk/jdk/pull/22616#issuecomment-2524971845), re-visit "the initialisation and locking in this area, e.g. addToCache is a static synchronized method so very coarse locking." See also, [this comment](https://bugs.openjdk.org/browse/JDK-8344924?focusedId=14729295&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14729295).