XF 1.1 Site's Base URL Slowing Down Site?

My currrent htaccess

Code:
#      Mod_security can interfere with uploading of content such as attachments. If you
#      cannot attach files, remove the "#" from the lines below.
#<IfModule mod_security.c>
#      SecFilterEngine Off
#      SecFilterScanPOST Off
#</IfModule>
 
ErrorDocument 401 default
ErrorDocument 403 default
ErrorDocument 404 default
ErrorDocument 500 default
 
<IfModule mod_rewrite.c>
  Options +FollowSymLinks
        RewriteEngine On
 
RewriteRule ^/([^/]*)/([^/]*)$ /$1.php/$2
 
        #      If you are having problems with the rewrite rules, remove the "#" from the
        #      line that begins "RewriteBase" below. You will also have to change the path
        #      of the rewrite to reflect the path to your XenForo installation.
        #RewriteBase /xenforo
RewriteCond %{HTTP_HOST} ^8thos\.com$ [NC]
RewriteRule ^(.*)$ http://www.8thos.com/$1 [R=301,L]
        RewriteCond %{REQUEST_FILENAME} -f [OR]
        RewriteCond %{REQUEST_FILENAME} -l [OR]
        RewriteCond %{REQUEST_FILENAME} -d
        RewriteRule ^.*$ - [NC,L]
        RewriteRule ^(data|js|styles|install) - [NC,L]
        RewriteRule ^.*$ index.php [NC,L]
    RewriteRule ^/threads/ /forum/threads
RewriteRule ^/forums/ /forum/forums
</IfModule>
 
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