I was thinking of implementing real time chat using a PHP backend, but I ran across this comment on a site discussing comet:
My understanding is that PHP is a terrible language for Comet, because Comet requires you to keep a persistent connection open to each browser client. Using mod_php this means tying up an Apache child full-time for each client which doesn’t scale at all. The people I know doing Comet stuff are mostly using Twisted Python which is designed to handle hundreds or thousands of simultaneous connections.
Is this true? Or is it something that can be configured around?