RFR: 8366809: JFR: Use factory for aggregator functions

Wed Sep 3 14:35:53 UTC 2025

Could I have a review of a PR that replaces the selection of the aggregator function with a factory, so that the selection only needs to happen once per column instead of for every row?

Testing: jdk/jdk/jfr + manual inspection 'jfr view' output

Thanks
Erik

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Commit messages:
 - Initial

Changes: https://git.openjdk.org/jdk/pull/27072/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27072&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8366809
  Stats: 40 lines in 3 files changed: 10 ins; 2 del; 28 mod
  Patch: https://git.openjdk.org/jdk/pull/27072.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27072/head:pull/27072

PR: https://git.openjdk.org/jdk/pull/27072