Googlebot designed by google is the indexer/crawler used by google to index the websites. The googlebot crawls the websites and indexes the data in its database. Googlebot spends a good amount of time on each website.
According to google the mod_pagespeed reduces the website load time by 50%.
The main features of mod_pagespeed are:-
- No need to change the existing cms settings eg like wordpres, joomla fully compatile.
- It recompresses the images when the html text changes
- new extended lifetime for images like logos and banners.
Google is currently working with godaddy to integrate mod_pagespeed to integrate into their servers. Apart from godaddy the code has been released for CentOS , RHEL, Ubuntu , Debian and Fedora but you can also download the source and compile it for your distribution.