wc-ajax update_order_review makes the checkout slow

  • Hi,

    wc-ajax=update_order_review is very slow, sometimes it takes up to 8s.
    It happens when a user change the payment method during checkout but also when finally hit the ‘buy now’ button. There is no visual feedback to the user that the page is doing something.
    Same bottle neck with wc-ajax=get_refreshed_fragments on any page.
    So this two functions are often consuming 80-90% of page load.
    For the latter one I tried this solution woo issue 9365 on githun but it is still there.

    My page works really fast on premium hosting, php7, all latest versions of WP, woo, plugins and the usage of wp-rocket. But the checkout is incredible poor.
    I googled and tried a lot’s to improve but could yet not accomplish this issue.

    Any ideas?
    Thank you
    tom

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