Web Application Works Faster With IP Address

Hi Experts,

I am running a PHP MySQL application on Windows 2012 IIS, but it was extremely slow. Changing my db host from localhost:3306 to 127.0.0.1:3306 seem to do the trick. Any idea why?

The hosting company telling me that it is because the DNS lookup, but there is a difference of 7s. Could a DNS lookup take that long?
APD TorontoSoftware DeveloperAsked:
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Dave BaldwinFixer of ProblemsCommented:
Well that's probably bullshit.  Neither one of those addresses will go thru DNS.  As far as I know...
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Dave BaldwinFixer of ProblemsCommented:
On the other hand... 'localhost' on that machine may resolve initially to the '::1' IPv6 address.  If the MySQL server does not respond to the IPv6 address immediately, that could explain the delay.
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APD TorontoSoftware DeveloperAuthor Commented:
Thank you!
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