Magento – GZIP compression enabled in Apache but not working with Magento

Make sure mod_deflate is on in Apache. You can check by creating an info.php file and calling phpinfo();. It will output server PHP / Apache specs in the browser. Don't forget to remove it when you're done!

Then add the following to your htaccess file

<IfModule mod_php5.c>
    ## enable resulting html compression
   php_flag zlib.output_compression on
</IfModule>

<IfModule mod_deflate.c>

    ## Force compression for mangled `Accept-Encoding` request headers
    <IfModule mod_setenvif.c>
        <IfModule mod_headers.c>
            SetEnvIfNoCase ^(Accept-EncodXng|X-cept-Encoding|X{15}|~{15}|-{15})$ ^((gzip|deflate)\s*,?\s*)+|[X~-]{4,13}$ HAVE_Accept-Encoding
            RequestHeader append Accept-Encoding "gzip,deflate" env=HAVE_Accept-Encoding
        </IfModule>
    </IfModule>

    ## Compress all output labeled with one of the following media types.
    <IfModule mod_filter.c>
        AddOutputFilterByType DEFLATE "application/atom+xml" \
                                      "application/javascript" \
                                      "application/json" \
                                      "application/ld+json" \
                                      "application/manifest+json" \
                                      "application/rdf+xml" \
                                      "application/rss+xml" \
                                      "application/schema+json" \
                                      "application/vnd.geo+json" \
                                      "application/vnd.ms-fontobject" \
                                      "application/x-font-ttf" \
                                      "application/x-javascript" \
                                      "application/x-web-app-manifest+json" \
                                      "application/xhtml+xml" \
                                      "application/xml" \
                                      "font/eot" \
                                      "font/opentype" \
                                      "image/bmp" \
                                      "image/svg+xml" \
                                      "image/vnd.microsoft.icon" \
                                      "image/x-icon" \
                                      "text/cache-manifest" \
                                      "text/css" \
                                      "text/html" \
                                      "text/javascript" \
                                      "text/plain" \
                                      "text/vcard" \
                                      "text/vnd.rim.location.xloc" \
                                      "text/vtt" \
                                      "text/x-component" \
                                      "text/x-cross-domain-policy" \
                                      "text/xml"

    </IfModule>

    ## Map the following filename extensions to the specified
    ## encoding type in order to make Apache serve the file types
    ## with the appropriate `Content-Encoding` response header
    ## (do note that this will NOT make Apache compress them!).
    <IfModule mod_mime.c>
        AddEncoding gzip              svgz
    </IfModule>

</IfModule>

Accept Encoding is a request header. This comes from your browser to the server telling the server that this browser will accept the gzip or deflate compression. If the server does compress the resource it will respond with Content-Encoding: gzip.

I am doubtful that you will gain any speed-up with disabling gzip as it is very fast.

However, as this it is hard to tell exactly how to do this since I do not know whether you have only one web server, or a proxy as well which may be introducing compression, and what you actual configuration is...

It looks like you've already done some of this but here's what you should look at:

• .htaccess
• httpd.conf
• Virtual Host configuration file: somewhere in /etc/httpd/conf.d (take a look at httpd.conf for an include statement pointing to the directory where virtual host files may be located)

In general it seems that if you disable mod_deflate in httpd.conf you should be good, as is outlined here: https://scottlinux.com/2012/09/13/disable-http-compression-in-apache/

Debian/Ubuntu:

$ sudo a2dismod deflate

Module deflate disabled. Run '/etc/init.d/apache2 restart' to activate new configuration! $ sudo /etc/init.d/apache2 restart

Red Hat or CentOS: $ sudo nano /etc/httpd/conf/httpd.conf Comment out this line:

LoadModule deflate_module modules/mod_deflate.so

It should now look like this:

#LoadModule deflate_module modules/mod_deflate.so

Close and save the file then restart httpd:

$ sudo /etc/init.d/httpd restart

Hope this helps :)