I just finish my size optimizatoin.
Since my site is still very slow i think my problem is with the low server because i have over 20.000product and 100.000images. Now i use Siteground's Magento Cloud Hosting with 2 x 3.0 GHz CPU Cores, CentOS, 2GB RAM, 50GB SSD. Its cost me about 70euro. For the same amount i could choose Mochahost's Barista-3 cloud server with 6gb ram, 4x9GHz cpu and 200gb space which is much better but not Magento hosting. Should i change to Mochahost or Spend more on Siteground.
Thanks for any help.