The only way to really know is to test it yourself, with your machine and your setup. Because what might be fast for me might be slow for you. You should also have an overall goal in mind of how much time you can spend on page loads.
If you need help testing scripts then you can go for apache bench, or APD, or Zend, or ... (insert favorite profiler here) -- Teach a man to fish... NEW? | http://www.catb.org/~esr/faqs/smart-questions.html STFA | http://marc.theaimsgroup.com/?l=php-general&w=2 STFM | http://php.net/manual/en/index.php STFW | http://www.google.com/search?q=php LAZY | http://mycroft.mozdev.org/download.html?name=PHP&submitform=Find+search+plugins
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