title: CrudRepository and Hibernate: save(List<S>) vs save(Entity) in transaction
body: <p>Would it make any difference if I do:</p>
  
  <pre><code>@Transactional
  public void processData() {
      List&lt;MyEntity&gt; entities = ....;
      MyEntityRepository.save(entities);
  }
  </code></pre>
  
  <p>vs.</p>
  
  <pre><code>@Transactional
  public void processData() {
      List&lt;MyEntity&gt; entities = ....;
      for (MyEntity entity : entities) {
          MyEntityRepository.save(entity);
      }
  }
  </code></pre>
  
  <p>What is the difference in terms of the underlying queries and performance?</p>