How to cache json with wp-super cache

It did appear that the json wasn’t being cached by wp-super-cache, but we decided to take a different approach. By using the transient api, we were able to do a faux-cache on all json, and drastically reduce the taxing of the database. Then on the ajax side of things, we are caching the html that is created from this semi-cached json. Things are super speedy! Here is a scaled down version of the code and concept.

    $transient_key = 'my-transient-key'; 
    $data = get_transient( $transient_key ); 

    if ( $data == '' ) { 
      $args = array(

    'post_type' => 'brand', 
    'posts_per_page' => 50

  );

  $postsArray = array();  
  // The Query
 query_posts( $args );

  // The Loop
  while ( have_posts() ) : the_post();

    $brand_id = get_the_ID();
    $slug = basename(get_permalink());
    $title = get_the_title();
    $description = get_the_content();

                $posts = array(

                   'brand_id' => $brand_id,
                   'machine_name' => $slug,
                              'postTitle' => $title,
                   'description' => $description,

                   );

    array_push($postsArray,$posts);


  endwhile;

   $data = json_encode($postsArray);


 set_transient( $transient_key, $data, 60 * 60 * 24 ); // one day
 }  // now all the brand information is cached as one table call.

echo $data;