Help needed for webprog24

[webprog24]

Hello,

I run the website https://www.webprog24.com and I am beginning to bang the head against the wall because the page speed is low. I did really a lot:

• Varnish
• Memchached
• APC Cache
• Cloudflare
• Compression of JS and CSS
• whatever
  

The problem is the website is dramatically slow. It just does not work the way I want. I have a few small things I can do but in general, I really did a lot to increase the page speed of this website. Can anybody give me tips on how to improve the page speed there?