Thanks for your comments.
I only worked with the Apache and Zeus FastCGI implementations so
far. Apache's mod_fastcgi is written by the same guys who wrote the
FastCGI spec, and it behaved very well for me in production (I used
it with Zope). I only did a couple of quick tests with Zeus, but it
looks like a solid one too. I don't know much about the state of
FastCGI support for IIS and iPlanet.
Other things that talk FastCGI (this is not a complete list by
any means):
- Zope has a FastCGI server integrated.
- WebWare has a FastCGI adapter (in the default distribution).
- PHP 4 has FastCGI support in it's SAPI (server API). A funny
thing to note is that the Zeus folks did some tests with Zeus+PHP
using ISAPI and Zeus+PHP using FastCGI, and they concluded that the
FastCGI method is much more stable and robust (see
http://support.zeus.com/products/php.html#isapi). Also, benchmarks
done by them show that Zeus/FastCGI/PHP is significantly (26%)
faster than Apache/mod_php.
