The remark was written when the store was a Dictionary and the reclaim was
a full scan. Three things in it were stale:
It named a Dictionary capacity. HashSet and Dictionary share HashHelpers,
so the from-empty progression is identical (verified: 36,353 -> 75,431 ->
156,437 -> 324,449 -> 672,827 for both) and 324,449 is still exactly right
-- but it is a HashSet capacity now.
It priced a slot at 52 bytes. Measured, a HashSet<UInt128> slot is 36 and a
Dictionary<UInt128,long> slot is 52, so the total is ~19 MB at this cap (36
a set slot plus 24 a ring record), not ~17 MB.
It quoted full-sweep costs of ~6 ms here and ~26 ms at 968,897 as the price
of raising it. That sweep no longer exists; holds are retired from the ring
in expiry order, so the ceiling is memory rather than an on-loop scan.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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