One of the tuning activities is to turn on GZIP compression for HTTP requests.
This tuning can save lots of network traffic and your page will load in a short time.
Just put the lines bellow on the httpd.conf and restart the server
LoadModule deflate_module modules/mod_deflate.so
LoadModule headers_module modules/mod_headers.so
#Only the specified MIME types will be compressed.
AddOutputFilterByType DEFLATE application/atom+xml
AddOutputFilterByType DEFLATE application/atomcat+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/json
AddOutputFilterByType DEFLATE application/octet-stream
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/javascript
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/xsl
# Ensures that images and executable binaries are not compressed
SetEnvIfNoCase Request_URI \\.(?:gif|jpe?g|png|exe)$ no-gzip dont-vary
# Ensure that proxies do not deliver the wrong content
Header append Vary User-Agent env=!dont-vary
SetEnvIf Request_URI ^/acce(.*) no-gzip dont-vary
