[jdk17u-dev] RFR: 8276662: Scalability bottleneck in SymbolTable::lookup_common()

[Aleksey Shipilev]

Clean backport to improve `SymbolTable` performance.

Additional testing:
 - [x] Linux x86_64 fastdebug `tier1`
 - [x] Linux x86_64 fastdebug `tier2`
 - [x] Linux x86_64 fastdebug `tier3`

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Commit messages:
 - Backport 1d7cef33c5ff24695463a03c58c7ca350ec190fc

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/27/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=27&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276662
  Stats: 7 lines in 1 file changed: 7 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/27.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/27/head:pull/27

PR: https://git.openjdk.java.net/jdk17u-dev/pull/27