how optimize CDN without using plugins

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You get 94% / 87% so what seem to be the problem?

The only thing i can thing of is the 7.0s load time which is ok but a bit long..

I have also checked your website on Google PageSpeed Insights and the results warn’t too bad.

  1. You need better servers, fast servers
  2. Try combining your JS files and codes and load them in the footer before the tag ends.

TIP:
The only JS file you should keep in your header is the main jQuery JS