Does rewriting ad to serverload much? I am about to make something but it is heavy rewiting, it will rewrite lots of images, the question is does this have an impact on server load? If theres 20 image rewrites per page. Thanks
Of course it has an impact - whether its significant will depend entirely on your traffic and server specs. If you think it may be an issue, ensure you place the rewriterules into your httpd.conf file rather than .htaccess. .htaccess files are interpreted for every request, whereas the httpd.conf is compiled once when the server restarts.