public function update( &$product ) {
		$product->save_meta_data();

		if ( ! $product->get_date_created() ) {
			$product->set_date_created( time() );
		}

		$new_title = $this->generate_product_title( $product );

		if ( $product->get_name( 'edit' ) !== $new_title ) {
			$product->set_name( $new_title );
		}

		// The post parent is not a valid variable product so we should prevent this.
		if ( $product->get_parent_id( 'edit' ) && 'product' !== get_post_type( $product->get_parent_id( 'edit' ) ) ) {
			$product->set_parent_id( 0 );
		}

		$changes = $product->get_changes();

		if ( array_intersect( array( 'attributes' ), array_keys( $changes ) ) ) {
			$product->set_attribute_summary( $this->generate_attribute_summary( $product ) );
		}

		// Only update the post when the post data changes.
		if ( array_intersect( array( 'name', 'parent_id', 'status', 'menu_order', 'date_created', 'date_modified', 'attributes' ), array_keys( $changes ) ) ) {
			$post_data = array(
				'post_title'        => $product->get_name( 'edit' ),
				'post_excerpt'      => $product->get_attribute_summary( 'edit' ),
				'post_parent'       => $product->get_parent_id( 'edit' ),
				'comment_status'    => 'closed',
				'post_status'       => $product->get_status( 'edit' ) ? $product->get_status( 'edit' ) : 'publish',
				'menu_order'        => $product->get_menu_order( 'edit' ),
				'post_date'         => gmdate( 'Y-m-d H:i:s', $product->get_date_created( 'edit' )->getOffsetTimestamp() ),
				'post_date_gmt'     => gmdate( 'Y-m-d H:i:s', $product->get_date_created( 'edit' )->getTimestamp() ),
				'post_modified'     => isset( $changes['date_modified'] ) ? gmdate( 'Y-m-d H:i:s', $product->get_date_modified( 'edit' )->getOffsetTimestamp() ) : current_time( 'mysql' ),
				'post_modified_gmt' => isset( $changes['date_modified'] ) ? gmdate( 'Y-m-d H:i:s', $product->get_date_modified( 'edit' )->getTimestamp() ) : current_time( 'mysql', 1 ),
				'post_type'         => 'product_variation',
				'post_name'         => $product->get_slug( 'edit' ),
			);

			/**
			 * When updating this object, to prevent infinite loops, use $wpdb
			 * to update data, since wp_update_post spawns more calls to the
			 * save_post action.
			 *
			 * This ensures hooks are fired by either WP itself (admin screen save),
			 * or an update purely from CRUD.
			 */
			if ( doing_action( 'save_post' ) ) {
				$GLOBALS['wpdb']->update( $GLOBALS['wpdb']->posts, $post_data, array( 'ID' => $product->get_id() ) );
				clean_post_cache( $product->get_id() );
			} else {
				wp_update_post( array_merge( array( 'ID' => $product->get_id() ), $post_data ) );
			}
			$product->read_meta_data( true ); // Refresh internal meta data, in case things were hooked into `save_post` or another WP hook.

		} else { // Only update post modified time to record this save event.
			$GLOBALS['wpdb']->update(
				$GLOBALS['wpdb']->posts,
				array(
					'post_modified'     => current_time( 'mysql' ),
					'post_modified_gmt' => current_time( 'mysql', 1 ),
				),
				array(
					'ID' => $product->get_id(),
				)
			);
			clean_post_cache( $product->get_id() );
		}

		$this->update_post_meta( $product );
		$this->update_terms( $product );
		$this->update_visibility( $product, true );
		$this->update_attributes( $product );
		$this->handle_updated_props( $product );

		$product->apply_changes();

		$this->update_version_and_type( $product );

		$this->clear_caches( $product );

		do_action( 'woocommerce_update_product_variation', $product->get_id(), $product );
	}