Fast_CGI + PHP7 + NGINX - Blazing fast for cache hits, 10x slower than without any caching for cache misses

Question

I scanned through my entire site with Screaming Frog SEO Spider and got an average speed of 0.83 URI/second with an empty cache.

With a filled cache the same run through averages 18.69 URI/second.

Without any caching I get around 9 URI/second.

I have no idea what could cause this and can't find other references to this issue on the web. This is something I've experienced with every VPS I've used Fast_CGI with NGINX on. What could cause results like this? Thanks for any leads you can give me to work with.

Answer 1

1) Disable Wordpress cache plugins if you have them.

2) Disable all other plugins to see if it helps.

3) Enable PHP opcache. Uncomment in your php.ini opcache.enable=1 .

4) Disable xdebug if you have it (again, in php.ini).

5) Restart nginx & php-fpm.