本站之前针对Joomla加速写过两篇相关文章合理利用joomla cache(缓存) 让网站速度翻倍 、System-cache让Joomla网站速度再翻倍,像子弹在飞
当然提速不止上面两篇，今有幸又得一文来自Joomla.cn的提速教程（以下引自原文）
Joomla网站的页面加载速度一直并不是强项。但其实只要两个简单的手段，访问Joomla网站的速度就会大大提高：
1、先通过插件管理，开启所有的搜索引擎友好链接（SEF)插件，再通过“全局设置”开启Joomla的搜索引擎友好链接（SEF)；注意顺序不能颠倒。
2、用下面的代码替代掉你的Joomla根目录下的htaccess.txt的所有内容，然后将它改名为.htaccess：
# @version $Id: htaccess.txt 10492 2008-07-02 06:38:28Z ircmaxell $
# @package Joomla
# @copyright Copyright (C) 2005 - 2008 Open Source Matters. All rights reserved.
# @license http://www.gnu.org/copyleft/gpl.html GNU/GPL
# Joomla! is Free Software
#
# Can be commented out if causes errors, see notes above.
Options +FollowSymLinks -Indexes
#
# mod_rewrite in use
RewriteEngine On
# Begin - Rewrite rules to block out some common exploits
# If you experience problems on your site block out the operations listed below
# This attempts to block the most common type of exploit `attempts` to Joomla!
#
# Block out any script trying to set a mosConfig value through the URL
RewriteCond %{QUERY_STRING} mosConfig_[a-zA-Z_]{1,21}(=|\%3D) [OR]
# Block out any script trying to base64_encode crap to send via URL
RewriteCond %{QUERY_STRING} base64_encode.*\(.*\) [OR]
# Block out any script that includes a tag in URL
RewriteCond %{QUERY_STRING} (\|%3E) [NC,OR]
# Block out any script trying to set a PHP GLOBALS variable via URL
RewriteCond %{QUERY_STRING} GLOBALS(=|\[|\%[0-9A-Z]{0,2}) [OR]
# Block out any script trying to modify a _REQUEST variable via URL
RewriteCond %{QUERY_STRING} _REQUEST(=|\[|\%[0-9A-Z]{0,2})
# Send all blocked request to homepage with 403 Forbidden error!
RewriteRule ^(.*)$ index.php [F,L]
#
# End - Rewrite rules to block out some common exploits
# RewriteBase /
# Begin - Joomla! core SEF Section
#
RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !^/index.php
RewriteCond %{REQUEST_URI} (/|\.php|\.html|\.htm|\.feed|\.pdf|\.raw|/[^.]*)$ [NC]
RewriteRule (.*) index.php
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]
#
# End - Joomla! core SEF Section
SetOutputFilter DEFLATE
Header set Expires "max-age=29030400, public"
Header unset ETag
FileETag None
ExpiresActive On
ExpiresDefault A600
ExpiresByType image/x-icon A2592000
ExpiresByType application/x-javascript A604800
ExpiresByType text/css A604800
ExpiresByType image/gif A2592000
ExpiresByType image/png A2592000
ExpiresByType image/jpeg A2592000
ExpiresByType text/plain A1200
ExpiresByType application/x-shockwave-flash A2592000
ExpiresByType video/x-flv A2592000
ExpiresByType application/pdf A2592000
ExpiresByType text/html A600
该方法的主要思路是加长浏览器缓存图片的时间。
