GZIP problem

@andisman just don’t use pingdom, it is flawed. It will show poorer scores when you serve brotli compressed, which is a better compression format.
To check gzip, brotli, and uncompressed headers, use KeyCDN’s excellent online curl tool:
https://tools.keycdn.com/curl

For overall performance check, use these:
https://gtmetrix.com/
https://developers.google.com/speed/pagespeed/insights/