Don,

one more thing to observe for your tests: each line from ip_conntrack
is hashed twice, with mirrored source / destination addresses. Ideally,
for a sufficiently oversized bucket count, that would be immaterial.
For the too-small-bucket case, hash list lengths should double.
With a too-bad hash function, things could get even worse.

(My apologies if you already did this doubling in your test code; my meatware
lisp parser is not very good...)

best regards
  Patrick

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