RFR: 8300917: Regression 2x and bimodal startup on Mac aarch64 in b27

[Viktor Klang]

On Wed, 25 Jan 2023 12:26:26 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposed to reduce contention in synchronized methods mainly by doing I/O operations outside synch blocks.

src/java.base/share/classes/java/lang/Module.java line 281:

> 279: 
> 280:     private static boolean isNativeAccessEnabled(Module target) {
> 281:         if (target.enableNativeAccess)

@minborg It'd seem a bit easier to implement using VarHandle and not having to use `synchronized`? Is the reason that you don't want to init VarHandle in this class? 🤔

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PR: https://git.openjdk.org/jdk/pull/12193