Mysql连接 - 通过IP然后域连接更快？

Question

Question

Is faster this

$servername = "125.125.55.10";
$username = "username";
$password = "password";
$conn = new mysqli($servername, $username, $password);

or this?

$servername = "mysql.server.com";
$username = "username";
$password = "password";
$conn = new mysqli($servername, $username, $password);

or it has no effect to speed?

I do not know if it has any practical use, but millisecond is milisecond....

Thank you

Answer 1

Yes, it could be considered slightly faster, as there is no need to resolve the domain to an IP address (DNS lookup). However, most modern technologies will cache the IP address when a connection is made, meaning a DNS lookup does not have to be made for every connection to the same address. So the difference is neglible, apart from the first time you connect to a site, and even then only for a few seconds at most.