Why optimize CSS?

• It blocks renderingtest: http://www.phpied.com/files/css-loading/table.php

• It’s verbosetext-decoration: underline

cannot be minified to td: u

Top 1000 study

1. Grab top Alexa sites2. Start Fiddler3. Load each site4. Export from Fiddler

<?php

$file = file('alexa.txt');

foreach ($file as $url) {

launch($url);

}

function launch($url) {

try {

$ie = new COM("InternetExplorer.Application");

$ie->Visible = true; $ie->Navigate2($url);

while ($ie->ReadyState != 4) sleep(1);

$ie->Quit();

} catch (Exception $e) {}

}

?>