WordPress at a glance
filter is not described

wp_cache_preload_taxonomies filter-hook . WPSCache 1.0

Usage

add_filter( 'wp_cache_preload_taxonomies', 'filter_function_name_2720' );
function filter_function_name_2720( $array ){
	// filter...

	return $array;
}
$array
-

Where the hook is called

wp_cron_preload_cache()
wp_cache_preload_taxonomies
wp-super-cache/wp-cache.php 3567
$taxonomies = apply_filters( 'wp_cache_preload_taxonomies', array( 'post_tag' => 'tag', 'category' => 'category' ) );

Where in WP core the hook is used WP Super Cache

Usage not found.