To me it seems the internal “page routing” or URL resolving that is consumes that much time. Loading the page with all its elements is fine. It’s just the determination _which_ page to load based on the requested URL that seems to take so long. Is there any documentation that I could refer to how WP’s internal page routing works?
Thanks for your response, Andrew. I disabled all plugins and also switched to the Twenty Fifteen theme, however, the decrease in the delay was not quite what I hoped for. It dropped by about 30%, but still left it at above 6 seconds. Opcache enabled, caching is done my memcached, minify is enabled as well. I guess there’s not a lot more to try, right?
The webserver jumps up to 80% of CPU load on one core when a new page is requested. That tells me there is a lot of code execution taking place during those 6 to 8 seconds of delay.
