Set the default value of DirectCodeBuilder::handlers to Null to reduce overhead in scenarios where there is no handler.
------------- Commit messages: - handlers default null Changes: https://git.openjdk.org/jdk/pull/21598/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21598&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8342700 Stats: 19 lines in 3 files changed: 14 ins; 0 del; 5 mod Patch: https://git.openjdk.org/jdk/pull/21598.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/21598/head:pull/21598 PR: https://git.openjdk.org/jdk/pull/21598
