Wordpress template part caching system. Allows parts of a Wordpress template to be stored as site transients in order to speed up the rendering of your theme template parts.

get_cached_template_part.php

<?php
/**
 * Retrieves a template part and caches the output to speed up site
 * NOTE: Because we are caching display of posts, we need to make sure to delete the transients when posts are updated or published that might affect these template parts. 
 * 
 * Uses this function in conjunction with the WP cache: http://codex.wordpress.org/Function_Reference/get_template_part
 *
 * @param  $slug (string) (required) The slug name for the generic template.
 * @param  $name (string) (optional) The name of the specialized template.
 * @return (string) HTML output of the template part. 
 */ 
if (!function_exists('get_cached_template_part')) {
	function get_cached_template_part($slug, $name = '', $ttl = 3600, $sitewide = false) {

		if (strlen($name) > 0) {
			$transient_id = $slug.'-'.$name;
		} else {
			$transient_id = $slug;
		}

		$cached_template_part = ($sitewide) ? get_site_transient( $transient_id ) : get_transient( $transient_id ); 

		if ( false === $cached_template_part ) {

			ob_start();
			get_template_part($slug,$name);
			$cached_template_part = ob_get_contents();
			ob_end_clean();

			if ($sitewide) {
				set_site_transient( $transient_id, $cached_template_part, $ttl );
			} else {
				set_transient( $transient_id, $cached_template_part, $ttl );
			}
		}
		echo $cached_template_part;
		return true;
	}
}
?>

If you use object cache click here: https://github.com/szepeviktor/tiny-cache