Hi, During performance optimization work on Class-File API as JDK lambda generator we found some static initialization killers. One of them is `java.lang.classfile.Attributes` with tens of static fields initialized with individual attribute mappers, and common set of all mappers, and static map from attribute names to the mappers.
I propose to turn all the static fields into lazy-initialized static methods and remove `PREDEFINED_ATTRIBUTES` and `standardAttribute(Utf8Entry name)` static mapping method from the `Attributes` API class. Please let me know your comments or objections and please review the [PR](https://github.com/openjdk/jdk/pull/19006) and [CSR](https://bugs.openjdk.org/browse/JDK-8331414), so we can make it into 23. Thank you, Adam ------------- Commit messages: - added impl comment - removed list of predefined attributes - move mappers implementations to AbstractAttributeMapper - 8331291: java.lang.classfile.Attributes class performs a lot of static initializations Changes: https://git.openjdk.org/jdk/pull/19006/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19006&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8331291 Stats: 2029 lines in 47 files changed: 904 ins; 619 del; 506 mod Patch: https://git.openjdk.org/jdk/pull/19006.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/19006/head:pull/19006 PR: https://git.openjdk.org/jdk/pull/19006
