too many close calls for non-opened fds

[Chris Rapier]

Rick Jones wrote:
>> Actually that was a mistake on my part. When -r option is used the close 
>> call occurs only during startup and not for every connection. During startup 
>> with -r option we get around 60K close calls.
>> We are about to do a fix for this issue on HP-UX (without -r option). The 
>> approach is to find out the open fds and close the unwanted ones. Will this 
>> be a valid approach.
> 
> I would think that the overhead of determining if an FD is open wouldn't 
> be that far off from closing it.

One question: I'm assuming its cheaper (or at least was at one time) to 
just close a whole bunch of FDs rather than track what FDs are being 
opened as they are being opened?