What are the ups and downs of using FastCGI C++  vs.  PHP/Python/Perl to do the same job. 
Any performance or design pitfalls or using one over the other? Even your opinions are welcome. (Tell me why one or the other rocks, or one or the other sucks).
There is a middle ground here.  Python (and I believe Perl and Ruby) allow you to call functions from C.  99 times out of 100, you won't need to.  But it's nice to know that the option is there if you need it.
Usually for webapps, the speed of the programming language simply isn't an issue.  In the time it takes to execute a single database query, a processor can execute a few billion instructions.  It's about the same for sending and receiving http data.
FastCGI C++ vs. A Script Language (PHP/Python/Perl)