一般来说，您可以使用WP Transients API 到save the query.

// Get any existing copy of our transient data
if ( false === ( $special_query_results = get_transient( \'special_query_results\' ) ) ) {
    // It wasn\'t there, so regenerate the data and save the transient
     $special_query_results = new WP_Query( \'cat=5&order=random&tag=tech&post_meta_key=thumbnail\' );
     set_transient( \'special_query_results\', $special_query_results, 12 * HOUR_IN_SECONDS );
}

// Use the data like you would have normally...

This article 通过论证存储WP_Query() 对象作为瞬态，并建议将昂贵查询返回的post ID存储在瞬态中，然后使用这些ID创建新的WP_Query. 诚然，使用这种方法，我们将很快返回到重复查询，但它们将是更轻的查询。

$cache_key = \'my-expensive-query\';
if ( ! $ids = get_transient( $cache_key ) ) {
    $query = new WP_Query( array(
        \'fields\' => \'ids\',
        // ...
    ) );

    $ids = $query->posts;
    set_transient( $cache_key, $ids, 24 * HOUR_IN_SECONDS );
}

$query = new WP_Query( array(
    \'post__in\' => $ids,
) );

// while ( $query->have_posts() ) ...