[lwip-devel] [task #6827] etharp could need some tuning

[Kieran Mansley]

Follow-up Comment #4, task #6827 (project lwip):

Any cache will have bad cases, there is no perfect solution.  I think a one
entry cache is a good compromise between performance and extra memory usage.

An alternative would be to make the table a linked list rather than an array,
and just move the current entry to the head of the list.  This should keep the
entries used most near the front, and  not require a great overhead as its
just pointer manipulation rather than copying whole entries.

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