We have a whitelist of files we automatically compress, using Gzip (compression level 5) at our edge servers.
The files in the whitelist are delivered in either Gzip or a non-compressed format based on the passed request headers.
Currently, the whitelisted content types are:
text/plain
text/css
text/html
text/xml
application/xml
application/xml+rss
application/xhtml+xml
application/x-javascript
application/javascript
text/javascript
application/json
image/svg+xml
image/x-icon
application/x-font-ttf
application/x-ttf
application/ttf
font/ttf
application/vnd.ms-fontobject
application/x-font-opentype
application/font-sfnt
application/vnd.apple.mpegurl
application/dash+xml
