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' ) );
		});
	?>