I created a script to check if the user has a completed order. If the user has no completed order, it disables the payment method "cheque". This script works, but after adding it to my functions.php file, I have severe performance issues when browsing the page. Do you see some optimization possibilities or where the problem might be?

function has_bought() { // Get all customer orders $customer_orders = get_posts( array( 'numberposts' => -1, 'meta_key' => '_customer_user', 'meta_value' => get_current_user_id(), 'post_type' => 'shop_order', // Post type of WC order 'post_status' => 'wc-completed' // Only orders with status "completed" ) ); // Return "true" when the customer already has an order return count( $customer_orders ) > 0 ? true : false; } add_filter('woocommerce_available_payment_gateways', 'customize_payment_gateways'); function customize_payment_gateways($gateways) { if (!has_bought()) { if (isset($gateways['cheque'])) { //Cancel the "cheque" payment gateway unset($gateways['cheque']); } } return $gateways; }