While implementing fragment caching on a wordpress site by using the technique described here: http://css-tricks.com/wordpress-fragment-caching-revisited/ I found that it seems to actually increase queries.

I have now cached many fragments on the page, and (in my local environment) I get 294 queries in 0.764 seconds (calculated with get_num_queries() and timer_stop(0)).

One snippet I've cached is the menu. If I remove fragment caching from it, I get: 292 queries in 0.736 seconds.

If I remove fragment caching from my search from: 290 queries in 0.862 seconds.

And if I remove more queries: 287 queries in 0.783 seconds.

So, what's happening here? Fragment caching is definitely working, but is it having a positive effect? Also, is it ok to have actually more queries with fragment caching than without?

In functions.php I have:

function fragment_cache($key, $ttl, $function) {
  if ( is_user_logged_in() ) {
    call_user_func($function);
    return;
  }
  $key = apply_filters('fragment_cache_prefix', 'fragment_cache_').$key;
  $output = get_transient($key);
  if ( empty($output) ) {
    ob_start();
    call_user_func($function);
    $output = ob_get_clean();
    set_transient($key, $output, $ttl);
  }
  echo $output;
}

In my post page

<?php fragment_cache('text' . $post->ID, WEEK_IN_SECONDS, function() {  ?>
    <?php the_sub_field('text'); ?>
<?php }); ?>

In my menu:

<?php 
    fragment_cache('primary-nav', YEAR_IN_SECONDS, function() {
        wp_nav_menu( array( 'theme_location' => 'primary' ) );
    });
?>