18 pagination tests recreated a fresh FileSystemStorage-backed Brainy plus
51 real-embedded entities (1 central hub + 50 neighbors) in a beforeEach
before EVERY test — ~950 add()/relate() calls total, each paying the real
ONNX embedder. Measured before this change: 303.69s (fresh run, this
session). None of these tests exercise similarity search, only graph
pagination, so three changes cut the cost without touching an assertion:
- vector: [] on every add() — add()'s `params.vector || embed(...)` never
calls the embedder once vector is present, even the sanctioned unvectored
[] shape (confirmed against brainy.ts's zero-norm-law comment: the
dimension-pinning gate is `vector.length > 0`, so [] never poisons
dimensions for a later real embed).
- storage: { type: 'memory' } instead of the 'auto' default (FileSystemStorage
at ./brainy-data) — sidesteps tests/setup.ts's global per-test
`rm -rf brainy-data`, which would otherwise corrupt a brain shared across
a describe's beforeAll out from under it.
- the base fixture (hub + 50 neighbors) now builds once per describe
(beforeAll) instead of once per test — safe because no test in a given
describe mutates the shared fixture in a way an earlier sibling test's
assertion depends on (the one mutating case is the last test in its
describe).
Measured after: 416ms for all 18 tests (2.35s wall including vitest
startup), all 18 still passing.
