7 – What would the next step in debugging a site that loads very slowly be?

I’m having a problem for a site to be very slow (10s page load). I’m trying to figure out what to problem could be but I’m out of ideas so hopefully you can help me with my next step. What I did:

  • Cache is enabled (core and views)
  • I’m using Redis caching
  • Database is optimized
  • Hosting has 4 cores and 6GB Memory

To find out what the problem could be I used Devel to show the queries. And it doesn’t show anything near 10s loading time.

I also comment out all the code that is on my html page, so no content or views are loaded and I still have a loading time of 10 seconds.

If you need additional information please let me know.

What could my next step be?