Implement JEP 526: Lazy Constants (Second Preview) The lazy list/map implementations are broken out from `ImmutableCollections` to a separate class.
The old benchmarks are not moved/renamed to allow comparison with previous releases. `java.util.Optional` is updated so that its field is annotated with `@Stable`. This is to allow `Optional` instances to be held in lazy constants and still provide constant folding. ------------- Commit messages: - Add optimization where the computing function is returned directly - Add benchmark of Optionals - Merge branch 'master' into lazy-constants - Update src/java.base/share/classes/java/lang/LazyConstant.java - Update src/java.base/share/classes/java/util/LazyCollections.java - Fix failing test - Clean up - Merge branch 'master' into lazy-constants - Update JEP number - Fix doc issues - ... and 76 more: https://git.openjdk.org/jdk/compare/1605e839...3e287031 Changes: https://git.openjdk.org/jdk/pull/27605/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27605&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8366178 Stats: 8721 lines in 60 files changed: 4112 ins; 4490 del; 119 mod Patch: https://git.openjdk.org/jdk/pull/27605.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/27605/head:pull/27605 PR: https://git.openjdk.org/jdk/pull/27605
