[lwip-devel] [bug #27352] Change ip_addr from struct to typedef (u32_t)

[Bill Auerbach]

Follow-up Comment #11, bug #27352 (project lwip):

I get it. So I assume it all works for me because I do have ETH_PAD defined
to 2.  ip_addr not being a packed struct got me the largest performance
improvement for all of the performance-improving changes that I made.

I guess the summary is, there are many processors/platforms where alignment
isn't a concern or where ETH_PAD is 2.  These systems probably incur a
significant performance hit for ip_addr packing. I'd sure like to see others
in this camp do a quick benchmark without ip_addr packing and see what they
get.

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