Here’s a tip from Brad Ney about how to speed up WordPress load times using web server compression:

First of all, upload a test file like “test.php” on your web server.  This file must contain this line:

<?php phpinfo(); ?>

View this file with a web browser and check if “zlib” is enabled by your hosting provider.

It it’s ok, place the following code in your header (above the DOCTYPE):

<?php
ini_set('zlib.output_compression', 'On');
ini_set('zlib.output_compression_level', '1');
?>

That’s all! Test if everything is working correctly.

Another way, probably safer than this one, is to use Wp Super Cache plugin and enable “Super Cache Compression” in its control panel.

Check out Top Referers to see where the visitors of your website are coming from.

Speed up WordPress using compression is a post from: WordPress World