If you take a closer look at the Google PageSpeed page, you will see that the recommended measures by Google are a minification. (https://developers.google.com/speed/docs/insights/MinifyResources). Minification means that whitespaces are removed from text documents. However, this is not necessary due to the compressed transfer by gzip – since this already happens during compression.
Since every browser normally has caching activated, Findologic only loads the files the first time you open your shop, and the browser then always provides them locally. The potential of this measure is therefore limited to the first time your shop is accessed and would not result in any speed improvement in the further click process.