Comment 20 for bug 113201

Duncan:

Thinking about this further, PAC probably cannot send more than one DNS query at
a time (based on the nature of the script activity). The improvement from the
re-write might have been minimal.

However, I think this bug has started to drift. dnsDomainIs() should not cause
the types of delays that isInNet() would, dnsDomainIs() does some string
comparisons. I've started running my mozilla sessions w/ PAC files for
diagnostic testing, and I have not seen delays as you have described. If this
persists in a 1.7b or later build, lets open a new bug.