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EnumSet.allOf can take advantage of the bulk BitSet.set(start, end) operation to run faster instead of adding each element individually.
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@ -53,7 +53,7 @@ public class EnumSet<T extends Enum<T>> extends AbstractSet<T> {
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public static <T extends Enum<T>>EnumSet<T> allOf(Class<T> elementType) {
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EnumSet<T> enumSet = createEmptyEnumSet(elementType);
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addAllElementsToSet(Arrays.asList(elementType.getEnumConstants()), enumSet);
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enumSet.bitset.set(0, elementType.getEnumConstants().length);
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return enumSet;
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}
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