Gzip components
Using this Gzip components in the page is also a better way to increase the performance.
While delivering any data from web server to browser, you can apply gzip compression over it. These gzipped data are decompressed when received by brwsers and treated as regular data. Almost all of the modern browsers supports gzip compression. To compress your content, you can do it either automatically using Apache’s mod_deflate or manually via your code. If you like to do it using mod_deflate, then you have to enable mod_deflate first and then modify your .htaccess file to make use of that. The following line in httpd.conf enables mod_deflate with apache

LoadModule deflate_module modules/mod_deflate.so

Now if you want to make use of mod_deflate and compress your content on the fly while delivering, you can add the following line in your .htaccess file.

AddOutputFilterByType DEFLATE text/html text/plain text/xml application/x-javascript

Or you can write PHP code for delivering gzipped contents. The following piece of code delivers any javascript file as a gzipped one.

<?php
//gzipjs.php
ob_start(”ob_gzhandler”);
header(”Content-type: text/javascript; charset: UTF-8″);
header(”Cache-Control: must-revalidate”);
$offset = 60 * 60 * 24 * 3;
$ExpStr = “Expires: ” .
gmdate(”D, d M Y H:i:s”,
time() + $offset) . ” GMT”;
header($ExpStr);
include(urldecode($_GET[’js’]));
?>

To deliver a javascript file (say prototype.js) using gzipjs.php you can load your scripts like this

<script type=”text/javascript” src=”gzipjs.php?js=prototype.js” ></script>

But, don’t just include any file passed to it (as i did it here in gzipjs.php). I wrote the code quickly to demonstrate the process. In practice you must sanitize the supplied argument before including. Otherwise it could be a very dangerous security breach.

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J.Vijayanand