The mod_gzip Apache Module uses the well established and publicly available IETF (Internet Engineering Task Force) Content-Encoding standards in conjunction with publicly available GZIP compression libraries such as ZLIB (Copyright 1995-1998 Jean-loup Gailly and Mark Adler) to deliver dynamically compressed content "on the fly" to any browser or user-agent that is capable of receiving it.
To use mod_gzip, simply uncomment the following line in your /usr/local/apache/conf/httpd.conf file and then run restart_apache.
#LoadModule gzip_module libexec/mod_gzip.so