我认为你可以提高绩效

将视图信息保存在单个选项中，而不是保存在post meta中，在保存时而不是检索时应用筛选日期创建标记并在瞬态中保存，而不是在类中保存查询（片段缓存

class PopularPosts
{

  const OPT = \'myplugin_popular_posts\';

  /**
   * After checking post date to see if save or not, increment a counter in a option
   * as an array where keys are post ids and values number of views
   */
  public function save(WP_Post $post)
  {
    if ( ! $this->shouldSave($post))
        return;
    $opt = get_option(self::OPT, array());
    if ( ! isset($opt[$post->ID]) ) {
       $opt[$post->ID] = 0;
    }
    $opt[$post->ID]++;
    update_option(self::OPT, $opt);
  }


  /**
   * Get markup from cache or rebuild it.
   * In latter case setup an action on shutdown to defer cache of the markup.
   * @return string
   */
  public static function getMarkup()
  {
    $key = self::OPT . date(\'Yz\'); // change everyday
    $cached = get_transient($key);
    if ( ! empty($cached))
        return $cached; // if cache is available just output it

    $instance = new static;
    $markup = $instance->buildMarkup();
    if (empty($markup))
        return \'\'; // return without cache empty results

    add_action(\'shutdown\', function() use($markup,$key) {
      set_transient($key, $markup, HOUR_IN_SECONDS);
    });

    return $markup;
  }


  /**
   * Get popular posts and return proper markup
   * @return string
   */
  public function buildMarkup()
  {
    $opt = get_option(self::OPT);
    if(empty($opt))
        return; // nothing to get and show

    $posts = $this->getPosts($opt); // obtain posts
    $out = \'\';

    $format = \'<li><a href="%s">%s</a><span>(%d %s)</span></li>\';

    foreach($posts as $post) { 
      $title = apply_filters(\'the_title\', $post->post_title);
      $plink = get_permalink($post);
      $out .= sprintf($format, $plink, $title, $opt[$post->ID], __(\'views\', \'txdmn\'));
    }

    return \'<ul class="popular_posts">\' . $out . \'</ul>\';
  }


  /**
   * Return true if the posts is not older than X days, where X is filterable
   * @return boolean
   */
  private function shouldSave( WP_Post $post )
  {
    $max_old = apply_filters( \'myplugin_popular_posts_max_days\', 31 );
    $ptime = DateTime::createFromFormat(\'Y-m-d H:i:s\', $post->post_date);
    $now = new DateTime(\'now\');

    return (int) $now->diff($ptime)->days <= (int) $max_old;
  }


  /**
   * Return X popular posts, where X number is filterable
   * @return array
   */
  private function getPosts($opt)
  {
    arsort($opt); // reverse order: more to less popular
    $num = apply_filters(\'myplugin_popular_posts_num\', 5);
    $ids = array_keys(array_slice($opt, 0, $num));

    return (array) get_posts(array(\'post__in\' => $ids));
  }

}

用法update posts views 计数器：

add_action(\'shutdown\', function() {
  if (is_single()) { // maybe check for post type using is_singular()
    $popularposts = new PopularPosts;
    $popularposts->save(get_queried_object());
  }     
});

和至show markup 在模板中：

<?= PopularPosts::getMarkup() ?>

计数器选项的问题和可能的改进should be reset evey day, 这里没有提供这方面的代码，但应该很容易实现。

使用lib-likeWP-TLC-Transient 您可以改进getMarkup 方法使用软过期和后台更新。类似这样：

  public static function getMarkup()
  {
    $key = self::OPT . date(\'Yz\'); // change everyday

    return tlc_transient( $key )
      ->updates_with(array(new static, \'buildMarkup\'))
      ->expires_in(HOUR_IN_SECONDS)
      ->get();
  }

请注意，我不熟悉Jetpack，所以我不知道如何从中获取post统计数据。为了方便起见，我用了一个钩子\'shutdown\' 只需增加选项中的计数器。这并不理想，因为即使用户只是刷新页面，计数器也会以这种方式递增。。。当然你可以改进它。

请注意，代码为completely untested.