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8225339: Optimize HashMap.keySet()/HashMap.values()/HashSet toArray() methods

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Reviewed-by: rriggs, redestad, smarks
This commit is contained in:
Tagir F. Valeev 2019-06-14 05:02:58 +00:00
parent 51cf24fcc0
commit 822c02437a
5 changed files with 387 additions and 3 deletions
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12
src/java.base/share/classes/java/util/HashSet.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 1997, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -358,4 +358,14 @@ public class HashSet<E>
public Spliterator<E> spliterator() {
return new HashMap.KeySpliterator<>(map, 0, -1, 0, 0);
}
@Override
public Object[] toArray() {
return map.keysToArray(new Object[map.size()]);
}
@Override
public <T> T[] toArray(T[] a) {
return map.keysToArray(map.prepareArray(a));
}
}