1. Intsall Autoptimize 
    • Enable Optimise JavaScript Code?
    • Enable Optimize CSS Code ?
    • Enable  Optimize HTML Code?
    • Enable  Optimize HTML Code?
    • Enable Lazy-Load images
    • Remove Google Fonts
    • Remove WordPress’ core emojis’ inline CSS
  2. Install Autoclear Autoptimize Cache to control cache size :
    • Navigate to Setting -> Autoptimize Cache Settings and set cache size the press Save Settings.
  3. Install WP-Optimize
    • Enable cache (just)