Insane product page loading time related to variations amount

Hello there,

— I have to say the loading time problem I have applies to woocommerce and subscription addition to woocommerce using subscription variations as well.

I have a product page that takes minimum 30 seconds to load because it have 72 variations. I detected page loading time increase a lot while I was adding variations.

I had a problem when I was adding variations at the beginning when I passed exactly 40 variations where some of my items were not linked together. Here’s a screenshot that explains this:

View post on imgur.com

When I click on 1GB variation, 1 Core and 60Go is automatically highlighted.
When I passed 40 variations, it was not linked anymore and page load was a lot lot faster!

Unfortunately, I need my variations being linked. I passed dozen of hours find a way to keep links after 40 variations adding this piece of code in my child theme functions.php:

function custom_wc_ajax_variation_threshold( $qty, $product ) {
return 100;
}

add_filter( ‘woocommerce_ajax_variation_threshold’, ‘custom_wc_ajax_variation_threshold’, 100, 2 );

The only thing I’ve done after this is to use two plugins that makes the whole website and my product page loads faster:
– BJ Lazy Load
– WC Speed Drain

That decrease loading time to 20 – 25sc average.

—

I’m using php7.1 and gzip compression is enabled. Server part looks like ok.
Otherwise, I see peoples with more than 200 variations and that do not have my issues.

I’m requiring your help WP Guys! I’m a php coder, so I’m not afraid of editing some code, I’m just not used to WordPress.

Thanks!

The page I need help with: [log in to see the link]