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List:       openjdk-serviceability-dev
Subject:    RFR: 8299234: JMX Repository.query performance
From:       Alexey Bakhtin <abakhtin () openjdk ! org>
Date:       2022-12-21 18:58:50
Message-ID: EqRxlqWX3U3hkJ0j0jd5bGsNmSvHCwLGtri72WTbKKw=.dc750454-40ae-4ebe-ba7e-af9cbaa5f5e3 () github ! com
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Please find a patch to improve JMX Repository.query performance

Using ObjectName.apply() allows significantly decrease memory usage and the number of GC cycles:
Before:

$ java test 1000000 1000000
Test PASSED in 8943169791 ns.
GC: G1 Young Generation getCollectionCount()=177 getCollectionTime()=118


After:

$ java test 1000000 1000000
Test PASSED in 4808213917 ns.
GC: G1 Young Generation getCollectionCount()=88 getCollectionTime()=53

Private ObjectName.matchDomains() method is also updated to minimize unnecessary memory allocation.

All javax/management jtreg tests passed successfully.

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

Commit messages:
 - 8299234: JMX Repository.query performance

Changes: https://git.openjdk.org/jdk/pull/11758/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11758&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299234
  Stats: 129 lines in 3 files changed: 2 ins; 115 del; 12 mod
  Patch: https://git.openjdk.org/jdk/pull/11758.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11758/head:pull/11758

PR: https://git.openjdk.org/jdk/pull/11758
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