How to quickly find out the IP for many domains?

Question

PHP

Greetings.
There is a task to get the current IP value from A-records for 200 thousand domains once a day.
Now this is done through a php script hanging on the crown, which checks in parts through the dns_get_record () function.
Average check time for one domain is 120 ms (freebsd 10).
But I think that this is not the fastest way.
What are some ideas?

Answer 1

An example in python + gevent: www.gevent.org/intro.html#example
You can "throw up" 10k requests in parallel

Answer 2

parallelize the check?

Answer 3

Do it asynchronously or in multiple threads.

Answer 4

Rewrite the check as a cgi script for php in c++ and parallelize both on one computer and on several. + if I'm not mistaken, there you can pull out the time after which the domain can change records; if it is more than a day, then there is no point in checking (I won’t say that for sure).