I'm looking at ways at reducing/eliminating startup overheads the classfile API in preparation of #17108, and have pushed a series of enhancements to that effect already. This PR is a collection of minor improvements which add up to a 1.5% reduction in retired instructions - or a 5% reduction in executed bytecode - on a simple lambda startup test.
------------- Commit messages: - Missed null-check on changeReturnType - Reduce java.lang.constant initialization overhead Changes: https://git.openjdk.org/jdk/pull/18991/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18991&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8331264 Stats: 72 lines in 6 files changed: 7 ins; 5 del; 60 mod Patch: https://git.openjdk.org/jdk/pull/18991.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/18991/head:pull/18991 PR: https://git.openjdk.org/jdk/pull/18991
