I logged this issue for EnumSet/EnumMap: https://bugs.openjdk.java.net/browse/JDK-8170826 <https://bugs.openjdk.java.net/browse/JDK-8170826>
Paul. > On 6 Dec 2016, at 09:53, Martin Buchholz <marti...@google.com> wrote: > > Almost every core library collection class can benefit from overriding > those default methods for performance. > But it hasn't been done consistently - I noticed this myself recently in > other collection classes; we have an effort under way to fix that for jdk9 > (notably ArrayDeque). But EnumMap/EnumSet have probably fallen into the > orphaned bucket. > > On Tue, Dec 6, 2016 at 12:03 AM, Michael Hixson <michael.hix...@gmail.com> > wrote: > >> Hello, >> >> I notice that EnumSet and EnumMap don't override any of the default >> methods that were added to collections in Java 8. Were they >> specifically considered then avoided during the Java 8 upgrades, or >> was it simply that no one got around to optimizing them? Are there >> existing issues/bugs for optimizing them? I couldn't find any. >> >> As one example: I suspect that EnumMap.forEach(action) could improve >> a lot. Right now it looks like iterating over keySet() and calling >> get(key) is faster than forEach(action) when it comes to EnumMap >> (unlike every other Map implementation I tested). >> >> -Michael >>
