hardening(adr-117): benchmarks + security/robustness test suite
Benchmarks (`python/bench/`, pytest-benchmark — opt-in via --benchmark-only):
| Hot path | Mean | Ops/sec | % of 100 Hz budget |
|---|---|---|---|
| BfldFrame HT20 1×1×52 | 800 ns | 1.25 Mops | 0.008% |
| BfldFrame HE20 2×1×242 | 1.3 μs | 750 kops | 0.013% |
| BfldFrame HE80 2×1×996 | 4.2 μs | 236 kops | 0.042% |
| BfldFrame HE160 2×2×1992 | 14 μs | 71 kops | 0.14% |
| BfldFrame.feedback_matrix() | 2.8 μs | 352 kops | — |
| WS edge_vitals decode | 7.4 μs | 134 kops | 0.074% |
| WS pose_data decode (3 persons) | 23 μs | 42 kops | 0.24% |
| BreathingExtractor.extract() 56sc | 28 μs | 35 kops | 0.28% |
| BreathingExtractor.extract() 114sc | 44 μs | 23 kops | 0.44% |
| BreathingExtractor.extract() 242sc | 79 μs | 13 kops | 0.79% |
| HeartRateExtractor.extract() 56sc | 105 μs | 9.5 kops | 1.05% |
All hot paths well under the 100 Hz ESP32 frame budget (10 ms).
Worst case (HeartRateExtractor) uses 1% of the budget — no
optimization needed. Scaling on n_subcarriers is sub-quadratic
(56→242 = 4.3× input, 2.8× time) — catches future O(n²)
regressions.
Security & robustness tests (`tests/test_security.py`, +27 tests):
- WS decoder: rejects non-object roots cleanly, survives 1 MB string
values, handles non-ASCII node IDs, survives deeply-nested JSON
(Python's json.loads built-in guard not bypassed)
- MQTT topic matcher: 9 edge-case parametrize entries including
$SYS topics, null-byte injection, mid-pattern `#` boundary,
empty-string boundary
- MQTT credential confidentiality: password never appears in
repr()/str(), never stored in plain client-instance attribute
- HA discovery: rejects null-byte-laced topics, rejects extra
slashes in node_id, rejects non-dict payload body (list, scalar,
invalid UTF-8 bytes) without crashing
- Semantic primitive listener: rejects topic-injection attempts
(prefix-injected paths, wrong case on final segment), survives
invalid UTF-8 payloads
- Public surface integrity: every name in wifi_densepose.__all__
AND wifi_densepose.client.__all__ resolves — catches accidental
re-export breakage between phases
- Multi-handler MQTT exception isolation: a crashing handler in
the middle of the registered list doesn't stop later handlers
from firing
Test count: 156 → 183 (+27). All passing.
Bench results steady-state confirm no Rust-binding-layer
optimization is needed before the v2.0.0 publish.
Refs: docs/adr/ADR-117-pip-wifi-densepose-modernization.md
Refs: #785
Co-Authored-By: claude-flow <ruv@ruv.net>
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