Improving template/rendering performance I'm running a Drupal commerce site and using Views to display up to 30  product node teasers per page.  The product display content type has a several fields (image, desc, manufacturer) and I am also using the flag module so that users can mark favorite products. As a result, the query ends up being fairly large with several joins.  

Views statistics reveal that despite the complex query, the slow page loads are due to the rendering time it takes...

Query build time    21.13 ms
Query execute time  1.67 ms
View render time    4237.2 ms


How do I improve my Drupal template/rendering performance to get my pages to load faster?
I would check for File IO; what does profiling your site tell you. I had similar issues and created the http://drupal.org/project/imageinfo_cache module and my views performance improved a lot by reducing file IO.

Seeing that your on shared hosing, checkout this http://kpayne.me/2012/02/04/use-register_tick_function-to-profile-your-code/