I\'m trying to speed up my website. Google insights (https://developers.google.com/speed/pagespeed/insights) tells me that a critical problem is to enable GZip compression.
First, check if gzip is enable in your server. You can use this tool: http://checkgzipcompression.com/
If it's ok, then, check that the compression is working FOR ALL your files. If Google Page Speed Test found on single file without GZIP compression from your server, the website with fail the test.
You can use Google Chrome for this:
Inspect your code; in the image you can see there is Content Encoding GZIP for the html file.
Clic on every file and find which doesn't have the GZIP encode; maybe the CSS type o JS type.
This is the simple configuration for gzip.conf
gzip on;
gzip_disable "MSIE [1-6]\\.(?!.*SV1)";
gzip_proxied any;
gzip_types text/plain text/css text/javascript text/xml application/javascript application/x-javascript application/xml application/xml+rss image/x-icon image/svg+xml image/jpeg image/jpg image/png
gzip_vary on;
Good Luck!