digital

I get the same script time results with this two different query :

FIRST : 

{set $articles_count=$category.subtree[$category.subtree|count()|sub(1)].object.class_identifier|eq(article)}

SECOND : 

{set $articles_count=fetch(content, list_count, hash('parent_node_id', $category.node_id,
'class_filter_type', 'include',
'class_filter_array', array('article'),
'depth_operator', '>',
'depth', 0 )) }