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[collect] Optimize Iterables.get() for ImmutableCollection #7888

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[collect] Optimize Iterables.get() for ImmutableCollection #7888

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4 changes: 3 additions & 1 deletion android/guava/src/com/google/common/collect/Iterables.java
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Original file line number Diff line number Diff line change
Expand Up @@ -777,7 +777,9 @@ public Iterator<T> iterator() {
checkNotNull(iterable);
return (iterable instanceof List)
? ((List<T>) iterable).get(position)
: Iterators.get(iterable.iterator(), position);
: ((iterable instanceof ImmutableCollection)
? ((ImmutableCollection<T>)iterable).asList().get(position)
: Iterators.get(iterable.iterator(), position));
}

/**
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4 changes: 3 additions & 1 deletion guava/src/com/google/common/collect/Iterables.java
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Original file line number Diff line number Diff line change
Expand Up @@ -767,7 +767,9 @@ public Spliterator<T> spliterator() {
checkNotNull(iterable);
return (iterable instanceof List)
? ((List<T>) iterable).get(position)
: Iterators.get(iterable.iterator(), position);
: ((iterable instanceof ImmutableCollection)
? ((ImmutableCollection<T>)iterable).asList().get(position)
: Iterators.get(iterable.iterator(), position));
}

/**
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