One possibility is that the first nameserver in your resolv.conf is slow/broken and gethostbyaddr() (which is typically synchronous) has to wait for it to timeout before moving on. dig, by contrast, will usually send out the request to all your NSs at once and use whatever reply comes back first.
-Sara ----- Original Message ----- From: Eric Coleman Newsgroups: php.internals To: PHPdev Sent: Friday, April 07, 2006 7:42 AM Subject: gethostbyname vs. dig Don't mean to piss anyone off or ask a question that doesn't belong here but here it goes: I wrote a script to check that domains resolve to our ip's. I noticed, that using gethostbyaddr() is significantly slower than using dig domain.com A +short Just curious as to why this is. Eric
