I set up a SEF link via .htaccess RewriteRule to one of the articles on my website just to see how that works, and it does work but it considerably increases the load time of that particular page. On average the articles (including the one I'm talking about, when not using the rewrite rule) load in about 1.3 seconds. With the rewrite rule, the load time is 3.3 seconds on average until the page displays, and the loader thingy in the firefox tab keeps spinning for another 2 seconds. I have WAMP setup on my computer, and the website is being accessed through no-ip.com.

Here is the .htaccess config (very simple, as you can see):

Options +FollowSymLinks

RewriteEngine On

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule ^o-sw-liji /NewSWL/o-nama.php?body=o-sw-liji

In httpd.conf I have this (somewhere I read this might affect the load time for some reason - searching for files through all the directories or something, I don't remember exactly what I read):

<Directory />
    Options None
    AllowOverride None
    Order deny,allow
    Deny from all
</Directory>

DocumentRoot "Z:/Program Files (x86)/wamp/www/"
<Directory "Z:/Program Files (x86)/wamp/www/">
    Options None
    AllowOverride All
    Order allow,deny
    Allow from all
</Directory>

Any ideas why .htaccess redirect increases the load time by so much?

UPDATE: so I put a session based counter in the "o-nama.php" script. Apparently when I access the web via the 'normal' link i.e. 'o-nama.php?body=o-sw-liji', the counter increases by one, as it should - it's one page load. But when the page is accessed through the redirected link, i.e. 'o-nama/o-sharewood-liji' the counter increases by 6-8, which naturally makes the load time a lot longer, since it's loading the same page for 6-8 times. I have no idea why this is happening. Any help is appreciated.