Claude f2174bdab3 perf: cache the sealed negentropy snapshot across NEG-OPENs ...

A NIP-77 server session rebuilt its reconciliation structure from
scratch on every NEG-OPEN: full id+created_at scan, per-entry hex
decode into a fresh StorageVector, O(n log n) seal. That cost grows
with the corpus and is paid even when nothing changed — the exact
shape of a periodic mirror's heartbeat, where N peers reconcile the
same broad filter over and over. relayBench measured 342 ms per
identical-set reconcile at 50k events vs strfry's 26 ms off its
always-current LMDB tree.

Reconciliation only *reads* the sealed storage, so one instance can
back any number of concurrent sessions:

- NegentropyServerSession now accepts a pre-sealed IStorage (the
  List<IdAndTime> constructor remains and delegates).
- SessionBackend.sealedNegentropyStorage() builds + seals (null when
  the set exceeds maxSyncEvents); LiveEventStore overrides it with a
  single-slot cache keyed by (filter set, write generation) plus a 30s
  TTL. The generation bumps on every accepted ingest; the TTL bounds
  staleness from delete paths the counter can't see (expiration
  sweeps, admin purges) — negentropy snapshots are point-in-time sets,
  so seconds of staleness only means a peer briefly re-offers ids.
- NegSessionRegistry.open consumes the shared sealed storage;
  over-cap NEG-ERR behavior unchanged (strfry parity).

relayBench gains a 'heartbeat' measurement — the identical-set
reconcile repeated immediately with no writes in between. At 50k
events: geode 342 ms -> 27.8 ms vs strfry 21.1 ms (near parity; was
13x). Cold reconciles (first open after a write) are unchanged.

Also fixes the GeodeVsStrfryNegentropySyncTest fixture to write
'nofiles = 0' so the opt-in interop test can boot strfry inside
containers with a low RLIMIT_NOFILE hard cap; the interop suite passes
against strfry v1-b80cda3 with the cache in place.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NeoCvXnTxsKzqurkmjdC46

2026-07-03 18:37:53 +00:00

..

main/kotlin/com/vitorpamplona/relaybench

perf: cache the sealed negentropy snapshot across NEG-OPENs

2026-07-03 18:37:53 +00:00

test/kotlin/com/vitorpamplona/relaybench

feat: add relayBench — head-to-head relay benchmark (geode vs strfry vs any)

2026-07-03 18:37:16 +00:00