RFR: 8253821: Improve ByteBuffer performance with GCM [v2]

[Anthony Scarpino]

> 8253821: Improve ByteBuffer performance with GCM

Anthony Scarpino has updated the pull request incrementally with one additional commit since the last revision:

  Xuelei comments

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/411/files
  - new: https://git.openjdk.java.net/jdk/pull/411/files/3a3a0296..b29c1ed5

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=411&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=411&range=00-01

  Stats: 17 lines in 6 files changed: 6 ins; 7 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/411.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/411/head:pull/411

PR: https://git.openjdk.java.net/jdk/pull/411