RFR: 8321013: Parallel: Refactor ObjectStartArray

Wed Nov 29 14:59:23 UTC 2023

Port the block-offset-table algorithm from Serial/G1 to Parallel.

There is ~20% reduction in young-gc pause, using card_scan.java from https://bugs.openjdk.org/browse/JDK-8310031

-------------

Commit messages:
 - pgc-bot

Changes: https://git.openjdk.org/jdk/pull/16884/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16884&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8321013
  Stats: 319 lines in 11 files changed: 67 ins; 167 del; 85 mod
  Patch: https://git.openjdk.org/jdk/pull/16884.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16884/head:pull/16884

PR: https://git.openjdk.org/jdk/pull/16884