If you do decide to move on with the concatenation (which at least would improve the GTMetrix performance grade from a cosmetic point of view), please remember to <strong>test thoroughly</strong> the pages that have the assets combined (pay attention to any JavaScript errors in the browser's console which is accessed via right click &amp; "Inspect") as, in rare cases, due to the order in which the scripts were loaded and the way their code was written, it could break some functionality.