Enabling gzip compression can reduce the size of the transferred response by up to 90%, which can significantly reduce the amount of time to download the resource, reduce data usage for the client, and improve the time to first render of your pages. — PageSpeed Insights
Compression can be enabled with this:
AddOutputFilterByType DEFLATE "text/html"/
"text/plain"/
"text/xml"/
"text/css"/
"text/javascript"/
"application/javascript"