> Currently, the two subclasses of `java.util.EnumSet` optimize bulk operations > when the argument is also a `EnumSet`, but there is no such optimization for > wrapper sets (returned by `Collections.unmodifiableSet`, > `Collections.synchronizedSet`, etc.) and immutable sets (returned by `Set.of` > methods) of `Enum`s. > > This PR introduces optimization classes for these situations. No public APIs > are changed.
Tingjun Yuan has updated the pull request incrementally with one additional commit since the last revision: Use `addAll` in `EnumSet.copyOf` It seems to be okay to use `addAll` in all cases. ------------- Changes: - all: https://git.openjdk.org/jdk/pull/12498/files - new: https://git.openjdk.org/jdk/pull/12498/files/41f4a909..098b3fff Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=12498&range=02 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12498&range=01-02 Stats: 6 lines in 1 file changed: 0 ins; 5 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/12498.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12498/head:pull/12498 PR: https://git.openjdk.org/jdk/pull/12498
