First, let's take a look at the default ping localhost
Address is:: 1, this is a IPV6 address
Then we will modify the localhost address in the hosts 127.0.0.1, this does not need to look to know, ping localhost must be the following results
In other words, the default Win7 above system, including Win2008 will localhost resolved to:: 1.
Practice tells us that it is much slower to use localhost in PHP in this case than 127.0.0.1. Above figure
The same is Discuz forum (not modified Hosts file), in the case of connecting localhost:
In the case of connecting 127.0.0.1
100 times the difference, the gap is pretty scary.
But I do not know the reason for this difference, but also want to know people to tell.