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

[Alan Bateman]

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 318:

> 316:     }
> 317: 
> 318:     private static boolean casEnableNativeAccess(Module target) {

The change looks okay but the naming is a bit misleading, maybe trySetEnableNativeAccess would be better, as this isn't an Unsafe/VarHandler compareAndSet. Also would be possible to add a comment to the method so it's consistent with the existing methods.

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