comprimir gzip apache

httpd.conf

#Fuente: http://blog.intropedro.com/es/content/activar-la-compresi%C3%B3n-gzip-en-apache-httpd

LoadModule deflate_module modules/mod_deflate.so

<IfModule mod_deflate.c>

    # Activamos la compresión
    SetOutputFilter DEFLATE

    # Indicamos los tipos de contenido a comprimir
    AddOutputFilterByType DEFLATE text/plain
    AddOutputFilterByType DEFLATE text/html
    AddOutputFilterByType DEFLATE text/xml
    AddOutputFilterByType DEFLATE text/gml
    AddOutputFilterByType DEFLATE text/css
    AddOutputFilterByType DEFLATE application/json
    AddOutputFilterByType DEFLATE application/xml
    AddOutputFilterByType DEFLATE application/xhtml+xml
    AddOutputFilterByType DEFLATE application/rss+xml
    AddOutputFilterByType DEFLATE application/javascript
    AddOutputFilterByType DEFLATE application/x-javascript

    # Indicamos las extensiones de los ficheros a comprimir
    <files *.html>
        SetOutputFilter DEFLATE
    </files>
    <files *.xml>
        SetOutputFilter DEFLATE
    </files>
    <files *.gml>
        SetOutputFilter DEFLATE
    </files>
    <files *.json>
        SetOutputFilter DEFLATE
    </files>
    <files *.js>
        SetOutputFilter DEFLATE
    </files>
    <files *.css>
        SetOutputFilter DEFLATE
    </files>

</IfModule>