RFR(s): Improving performance of Windows socket connect on the loopback adapter

[Alan Bateman]

On 23/07/2020 02:52, Nikola Grcevski wrote:
> Hi Alex,
>
> Yes, you are right about that. I didn't think about extending the check to more than 127.0.0.1.
>
> The existing macro was only testing for 127.0.0.1 in both IP4 and IP6 modes, so if the consensus
> is that we want to extend to all of the possible loopback addresses, I can modify the macro to add
> AND operations to clear the bits before we compare. It would require that we make our own
> macro for ::1/128, since the Windows SDK only tests for ::1 in IN6_IS_ADDR_LOOPBACK.
>
Alex makes a good point because 127.0.0.0/8 is reserved for the 
loopback. It's okay to separate this out as a separate improvement if 
you want.

-Alan.