Check Tags instanceof check before iterator empty check in Tags.of()

Signed-off-by: Johnny Lim <[email protected]>

Author: izeye

micrometer-core/src/main/java/io/micrometer/core/instrument/Tags.java

@@ -221,12 +221,15 @@ public static Tags concat(@Nullable Iterable<? extends Tag> tags, @Nullable Stri
      * @return a new {@code Tags} instance
      */
     public static Tags of(@Nullable Iterable<? extends Tag> tags) {
-        if (tags == null || tags == EMPTY || !tags.iterator().hasNext()) {
+        if (tags == null || tags == EMPTY) {
             return Tags.empty();
         }
         else if (tags instanceof Tags) {
             return (Tags) tags;
         }
+        else if (!tags.iterator().hasNext()) {
+            return Tags.empty();
+        }
         else if (tags instanceof Collection) {
             Collection<? extends Tag> tagsCollection = (Collection<? extends Tag>) tags;
             return new Tags(tagsCollection.toArray(new Tag[0]));