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java-topology/defects/synapse/patch/CLEAN.md
russell@unturf.com 7491349edc game-engines: allegro5/bullet3/box2d/dry CWE-407 scan 
bullet3-0001: btGhostObject::addOverlappingObjectInternal O(N²) linear dedup
  per broadphase step — even carries "too slow" self-admission comment (HIGH)
bullet3-0002: btSoftRigidCollisionAlgorithm::processCollision O(C×D) per
  frame on m_collisionDisabledObjects plain array (MEDIUM)
allegro5: CLEAN (vector_contains only on non-hot setup paths)
box2d: CLEAN (v3 rewrite uses b2HashSet throughout)
dry: CLEAN (HashSet/HashMap on all hot dedup paths)
2026-03-29 19:50:49 -04:00

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synapse — CWE-407 Scan: CLEAN

Scanned: 2026-03-29

Scope

  • synapse/push/mailer.py — deduped_ordered_list: seen = set() (line 939)
  • synapse/storage/databases/main/event_push_actions.py — seen_thread_ids: set() based
  • Event DAG traversal / state resolution: checked state_resolution_v2.py, event_federation.py
  • Room auth chain computation: uses set-based seen throughout

Verdict

No CWE-407 (algorithmic complexity / quadratic membership check) defects found. All deduplication in push notification, event DAG traversal, and state resolution uses set or dict structures. No list-based visited patterns in hot paths.