If you're using Wordpress bots and attacks can cause the Wordpress xmlrpc.php script to excessive CPU usage, sometime causing slowdowns on your site. Our web hosting runs on OpenLiteSpeed, which uses a different method of htaccess rules. You can block xmlrpc.php access with this .htaccess rule.
<IfModule LiteSpeed>RewriteEngine OnRewriteRule ^xmlrpc\.php$ - [F,L]RewriteRule ^xml-rpc\.php$ - [F,L]</IfModule>
Changes can sometimes take up to 15 minutes to take affect.