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Limit late reroutes to conflicting nets

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Jan Petykiewicz 2026-04-02 17:10:00 -07:00
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@ -5,39 +5,29 @@ Generated on 2026-04-02 by `scripts/record_performance_baseline.py`.
The full machine-readable snapshot lives in `docs/performance_baseline.json`.
Use `scripts/diff_performance_baseline.py` to compare a fresh run against that snapshot.
The default baseline table below covers the standard example corpus only. The heavier `example_07_large_scale_routing_no_warm_start` canary remains performance-only and is tracked through targeted diffs plus the conflict/frontier trace artifacts.
The default baseline table below covers the standard example corpus only. The heavier no-warm `example_07` canaries remain performance-only and are tracked through targeted diffs plus the trace artifacts.
Use `scripts/characterize_pair_local_search.py` when you want a small parameter sweep over example_07-style no-warm runs instead of a single canary reading.
The current tracked sweep output lives in `docs/pair_local_characterization.json` and `docs/pair_local_characterization.md`.
Use `scripts/record_iteration_trace.py` when you want a seed-42 vs seed-43 negotiated-congestion attribution run; the current tracked output lives in `docs/iteration_trace.json` and `docs/iteration_trace.md`.
Use `scripts/characterize_pair_local_search.py` for the tracked no-warm sweep in `docs/pair_local_characterization.json` and `docs/pair_local_characterization.md`.
Use `scripts/record_iteration_trace.py` for the current seed-42 vs seed-43 negotiated-congestion attribution in `docs/iteration_trace.json` and `docs/iteration_trace.md`.
| Scenario | Duration (s) | Total | Valid | Reached | Iter | Nets Routed | Nodes | Ray Casts | Moves Gen | Moves Added | Dyn Tree | Visibility Builds | Congestion Checks | Verify Calls |
| :-- | --: | --: | --: | --: | --: | --: | --: | --: | --: | --: | --: | --: | --: | --: |
| example_01_simple_route | 0.0040 | 1 | 1 | 1 | 1 | 1 | 2 | 10 | 11 | 7 | 0 | 0 | 0 | 4 |
| example_02_congestion_resolution | 0.3378 | 3 | 3 | 3 | 1 | 3 | 366 | 1164 | 1413 | 668 | 0 | 0 | 0 | 38 |
| example_03_locked_paths | 0.1929 | 2 | 2 | 2 | 2 | 2 | 191 | 657 | 904 | 307 | 0 | 0 | 0 | 16 |
| example_04_sbends_and_radii | 0.0279 | 2 | 2 | 2 | 1 | 2 | 15 | 70 | 123 | 65 | 0 | 0 | 0 | 8 |
| example_05_orientation_stress | 0.2367 | 3 | 3 | 3 | 2 | 6 | 299 | 1284 | 1691 | 696 | 0 | 0 | 149 | 18 |
| example_06_bend_collision_models | 0.1998 | 3 | 3 | 3 | 3 | 3 | 240 | 682 | 1026 | 629 | 0 | 0 | 0 | 12 |
| example_07_large_scale_routing | 0.2005 | 10 | 10 | 10 | 1 | 10 | 78 | 383 | 372 | 227 | 0 | 0 | 0 | 40 |
| example_08_custom_bend_geometry | 0.0176 | 2 | 2 | 2 | 2 | 2 | 18 | 56 | 78 | 56 | 0 | 0 | 0 | 8 |
| example_09_unroutable_best_effort | 0.0058 | 1 | 0 | 0 | 1 | 1 | 3 | 13 | 16 | 10 | 0 | 0 | 0 | 1 |
| example_01_simple_route | 0.0038 | 1 | 1 | 1 | 1 | 1 | 2 | 10 | 11 | 7 | 0 | 0 | 0 | 4 |
| example_02_congestion_resolution | 0.3614 | 3 | 3 | 3 | 1 | 3 | 366 | 1164 | 1413 | 668 | 0 | 0 | 0 | 38 |
| example_03_locked_paths | 0.1953 | 2 | 2 | 2 | 2 | 2 | 191 | 657 | 904 | 307 | 0 | 0 | 0 | 16 |
| example_04_sbends_and_radii | 0.0277 | 2 | 2 | 2 | 1 | 2 | 15 | 70 | 123 | 65 | 0 | 0 | 0 | 8 |
| example_05_orientation_stress | 0.2537 | 3 | 3 | 3 | 2 | 5 | 297 | 1274 | 1680 | 689 | 0 | 0 | 146 | 17 |
| example_06_bend_collision_models | 0.2103 | 3 | 3 | 3 | 3 | 3 | 240 | 682 | 1026 | 629 | 0 | 0 | 0 | 12 |
| example_07_large_scale_routing | 0.2074 | 10 | 10 | 10 | 1 | 10 | 78 | 383 | 372 | 227 | 0 | 0 | 0 | 40 |
| example_08_custom_bend_geometry | 0.0186 | 2 | 2 | 2 | 2 | 2 | 18 | 56 | 78 | 56 | 0 | 0 | 0 | 8 |
| example_09_unroutable_best_effort | 0.0079 | 1 | 0 | 0 | 1 | 1 | 3 | 13 | 16 | 10 | 0 | 0 | 0 | 1 |
## Full Counter Set
Each scenario entry in `docs/performance_baseline.json` records the full `RouteMetrics` snapshot, including cache, index, congestion, and verification counters.
These counters are currently observational only and are not enforced as CI regression gates.
For the current accepted branch, the most important performance-only canary is `example_07_large_scale_routing_no_warm_start`, which now finishes `10/10/10` after a bounded post-loop pair-local scratch reroute. The relevant counters for that phase are:
- `pair_local_search_pairs_considered`
- `pair_local_search_attempts`
- `pair_local_search_accepts`
- `pair_local_search_nodes_expanded`
The latest tracked characterization sweep confirms there is no smaller stable pair-local smoke case under the `<=1.0s` rule, so the 10-net no-warm-start canary remains the primary regression target for this behavior.
The tracked iteration trace adds one more diagnosis target: `example_07_large_scale_routing_no_warm_start_seed43`. That seed now remains performance-only, and its blowup is concentrated in late iterations rather than the initial basin. In the current trace, seed `43` matches seed `42` through iteration `5`, then spends three extra iterations with `4` completed nets while `net_03` and `net_06` dominate both `nodes_expanded` and `congestion_check_calls`.
The current accepted branch keeps the post-loop pair-local scratch reroute and now also narrows late negotiated reroutes to the current conflict set once all nets already reach target and only a few conflict edges remain. That keeps both no-warm `example_07` seeds at `10/10/10` while reducing main-loop work before pair-local repair.
Tracked metric keys: