Optimize NibbleArray to use pooled buffers

Massively reduces memory allocation of 2048 byte buffers by using
an object pool for these.

Spigot-Server-Patches/MC-Utils.patch

@@ -2090,18 +2090,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +
 +public final class PooledObjects<E> {
 +
-+    public static final PooledObjects<MutableInt> POOLED_MUTABLE_INTEGERS = new PooledObjects<>(new PooledObjectHandler<MutableInt>() {
-+        @Override
-+        public MutableInt createNew() {
-+            return new MutableInt();
-+        }
-+
-+        @Override
-+        public void onAcquire(final MutableInt value) {}
-+
-+        @Override
-+        public void onRelease(final MutableInt value) {}
-+    }, 200, -1);
++    public static final PooledObjects<MutableInt> POOLED_MUTABLE_INTEGERS = new PooledObjects<>(MutableInt::new, 200, -1);
 +
 +    private final PooledObjectHandler<E> handler;
 +    private final int maxPoolSize;
@@ -2171,16 +2160,16 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +    }
 +
 +    /** This object is restricted from interacting with any pool */
-+    static interface PooledObjectHandler<E> {
++    public static interface PooledObjectHandler<E> {
 +
 +        /**
 +         * Must return a non-null object
 +         */
 +        E createNew();
 +
-+        void onAcquire(final E value);
++        default void onAcquire(final E value) {}
 +
-+        void onRelease(final E value);
++        default void onRelease(final E value) {}
 +    }
 +
 +    protected static class IsolatedPool<E> {