RFR: 8253821: Improve ByteBuffer performance with GCM [v6]

[Anthony Scarpino]

> 8253821: Improve ByteBuffer performance with GCM

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

  comments v4

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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/836bf3ed..3a2f614e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=411&range=05
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=411&range=04-05

  Stats: 9 lines in 1 file changed: 2 ins; 3 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