RFR: 8357380: java/lang/StringBuilder/RacingSBThreads.java times out with C1

[Roger Riggs]

Reduced number of iterations from 10 million to 1 million to reduce cpu time

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Commit messages:
 - 8357380: java/lang/StringBuilder/RacingSBThreads.java times out with C1

Changes: https://git.openjdk.org/jdk/pull/26389/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26389&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8357380
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26389.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26389/head:pull/26389

PR: https://git.openjdk.org/jdk/pull/26389