The self-descriptive title of Java Enhancement Proposal (JEP) 246, Leverage CPU Instructions for GHASH and RSA, provides great insight into its goal. The point of this JEP was to improve the performance of cryptographic operations, specifically GHASH and RSA. The performance improvement has been achieved in Java 9 by leveraging the newest SPARC and Intel x64 CPU instructions.
This enhancement did not require new or modified APIs as part of the Java 9 platform.
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