WooCommerce - List stock levels of variable products

<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="UTF-8" />
<title>List Product Stock</title>
<meta name="viewport" content="width=device-width, initial-scale=1" />
</head>
<body>
<h1>List Product Stock</h1>
<?php
set_time_limit( 360 );

define('WP_USE_THEMES', false);

/** Loads the WordPress Environment and Template */
require( dirname( __FILE__ ) . '/wp-blog-header.php' );

// Get IDs of all products.
$args = array('post_type'=>'product', 'posts_per_page' => -1, 'fields' => 'ids', 'no_found_rows' => true, 'update_post_term_cache' => false, 'update_post_meta_cache' => false);
$products_query = new WP_Query($args);

$product_ids = array();
$product_ids = $products_query->posts; // No loop because only requested IDs.
wp_reset_postdata();

// Only get 2 products because even that is timing out.
$product_ids = array_slice( $product_ids, 0, 2 );
//$product_ids = array_slice( $product_ids, 0, 1 );

foreach ($product_ids as $id) {
    $product = wc_get_product( $id );
    echo "<p>Product name: ", $product->get_name(), "<br/>Type: ", $product->get_type(), "</p>";
    if ( 'variable' == $product->get_type( ) ) {
        $variation_attributes = $product->get_variation_attributes(); // Get titles of the variations.
        $attributes = array_keys( $variation_attributes );
        $available_variations = $product->get_available_variations();

        echo '<ul>';
        foreach ( array_keys( $available_variations ) as $index ) {
            if ( true == $available_variations[ $index ][ 'is_in_stock' ] ) {
                echo "<li><strong>", $variation_attributes[ $attributes[ 0 ] ][ $index ], "</strong> is in stock (", $available_variations[ $index ][ 'max_qty' ], " left).</li>";
            }

        }
        echo '</ul>';
    }
}

echo '<p>', get_num_queries (), ' SQL queries done.';
echo '<br />Page generation took ', timer_stop(), ' seconds.', '</p>';
?>
</body>