use of 10 new WP_Query : loading too slow (with url) [closed]

Why don’t you create a category-bio.php template that uses the normal loop? The WordPress query will already be built and you won’t have to have to create a new query just to do an operation that is already happening already.

You should really look at Wordress’ Template Hierarchy http://codex.wordpress.org/images/1/18/Template_Hierarchy.png You can target specific categories with a slug in the file name.

Creating category specific templates will make your theme less expensive memory wise.