Why pagination is slow, switching combination is slow, all AJAX requests are slow on my PrestaShop site?

Why pagination and all other AJAX requests are slow on my PrestaShop site? That’s probably due to Gzip for “application/json” is not enabled on your site. Gzip is crucial for page loading speed, it’s enable on most modern hostings, but gzip for “application/json” is not always enabled. If it’s not enabled, then all ajax request…