How to speed up the theme Sydney

Hi There,

I hope you can help me out. I am trying to speed up the Syndey theme for one of my customers. However the pagespeed test of Google points out there is a delay. It also states to minify CSS and Javascript. We use the free Theme of Sydney. What can we do to speed up our website? We are considering this theme for all the websites, however we want the quickest website possible. Please let me know. Thanks for the help.

Remove render-blocking JavaScript:…-includes/js/jquery/jquery.js?ver=1.12.4…s/jquery/jquery-migrate.min.js?ver=1.4.1
Optimize CSS Delivery of the following:…teorigin-panels/css/front.css?ver=2.4.25…ey/css/bootstrap/bootstrap.min.css?ver=1…t-form-7/includes/css/styles.css?ver=4.7…cf7-conditional-fields/style.css?ver=1.1…e/widgets/button/css/style.css?ver=1.8.1…w-button-atom-3a318bcefd40.css?ver=4.7.5…ns+Pro%3A400%2C400italic%2C600&ver=4.7.5…mily=Raleway%3A400%2C500%2C600&ver=4.7.5…ontent/themes/sydney/style.css?ver=4.7.5


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Kind Regards, Roman.