Performance improvements

Hello,

I’m optimizing a site and identified some slow code in this plugin, which could be improved. Would you be able to optimized the code below?

The inefficient code is in yith-pre-order-for-woocommerce/includes/class-yith-pre-order.php file on line #267 with the below function:

$product = wc_get_product( $product );

This is called within the following function:

public static function is_pre_order_product( $product ) {
			$return = false;

			// Use the WC product factory function to be sure $product is a WC_Product object.
			$product = wc_get_product( $product );

			if ( $product instanceof WC_Product ) {
				if ( $product->is_type( 'simple' ) || $product->is_type( 'variation' ) ) {
					if ( 'yes' === $product->get_meta( '_ywpo_preorder' ) ) {
						$return = true;
					}
				}
			}

			return apply_filters( 'ywpo_is_pre_order_product', $return, $product );
		}

The product object is already available (I don’t see how it needs to be retrieved via wc_get_product with the same object data), perhaps ID was originally used here to retrieve the object data? From a stack trace this was called from get_price_html in woocommerce, so it should be safe to assume it is a product.

Removing the wc_get_product line saves .5s on a shop page here and .1s+ on the product page.

Would it be possible for this line to be removed? The instanceof check could still be kept.

Thanks for your help.