You’re completely right at the beginning – caching is always a good idea, when you deal with results that are hard to get. But… That’s not the case in here. Registering post types and meta boxes is not complex at all – it’s just few PHP operations. They won’t take much time (nor computation power) … Read more
To check on your own system, use the Developer Tools (usually F12) and the Network tab. That will tell you which request is taking too much time.
I don’t think that the huge number of categories is responsible for slowing down your site. There might be other problems, like render blocking resources and loops. I recommend you to run your WordPress site through Page Speed Insights. It will help you find the exact reasons behind the slow speed. It will also recommend … Read more
I think that the issue is associated with the browser cache. Try clearing it. It should fix your issue. Also, you can try appending these PHP code to the .css file in the header for ruling out cache of the stylesheet: <link rel=”stylesheet” type=”text/css” media=”screen” href=”https://wordpress.stackexchange.com/questions/327486/your.css?<?php echo time(); ?>” />
I think, an idea would be to save your values on a new small table with all you need, and have a script that once every “n” hours update all metas.
I think, an idea would be to save your values on a new small table with all you need, and have a script that once every “n” hours update all metas.
Change loading order of blocks
I’m sure there are more sophisticated ways to debug the queries, but I’m not aware of them. So usually when I need to debug WP queries I use either Query Monitor or Debug Bar (with Slow Actions addon) plugin, which can be found on the wordpress.org plugin repository. These plugins help you trace which functions … Read more
Optimize WP site for millions of posts
First (if this is right then the solution was very quick) if the website is slow and then after deleting the ‘WP Fastest Cache’ cache it was temporarily fast again and then slowed down, it really sounds to me like that plugin is the culprit. Try disabling that plugin first and see if that fixes … Read more