Using transients on a single loop inside WordPress

gistfile1.php

<?php
/**
 * Using transients on a single loop inside WordPress
 * 
 * @link http://speckyboy.com/2011/12/14/website-speed-part-3-caching-wordpress/
 * /
$loop = get_transient( 'loop' );
if ( false === $loop ) {
 
       // Show the last 100 tweets from the custom post type tweets.
       $query = array('post_per_page' => 100,
                     'post_type' => 'tweets',
                     'post_status' => 'publish' ) ;
 
       $loop = new WP_Query($query);
 
        // transient set to last for 1 hour
        set_transient('loop', $loop, 60*60);
}
// do normal loop stuff
if ($loop->have_posts()) : while ($loop->have_posts()) : $loop->the_post();
 
// show content or whatever you like
the_content();
 
endwhile;endif;
 
?>