Extract the zip file and just drop the contents in the wp-content/plugins/ directory of your WordPress installation and then activate the Plugin from Plugins page.
Then activate the pageloader by using the tag
[pageloader] where you would like to see the time it took for the page to be rendered.
== Frequently Asked Questions ==
Q: How dp i choose where to print the \"render time\"
A: By using the shortcode
[pageloader]
== Changelog ==