Ampandheaust
d4e8634f67
Amp-Thread-ID: https://ampcode.com/threads/T-019f9d91-77c1-7206-a60f-ed6554ce92ab Co-authored-by: Heaust Azure <heaust.azure@gmail.com>
25 lines
1.1 KiB
Markdown
25 lines
1.1 KiB
Markdown
<!-- Repository research; excluded from the documentation site. -->
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# Phase 7 spatial performance
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The deterministic stress workload contains exactly **5,000 node rectangles** and
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**10,000 link rectangles** (seed 7). Nodes are arranged on a sparse 100 × 50
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grid and links connect nearby nodes. The query viewport is 1200 × 800 logical
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pixels at DPR 2. CI runs `npm run check:performance`; it checks exact totals and
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requires at least 90% culling at candidate p95. Timing is reported, never gated.
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Measured in the Amp orb on 2026-07-20: Node 20.9.0, Playwright/Chromium 1.49.1,
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generic orb CPU (Intel Xeon 2.60 GHz). Across 100 deterministic viewport queries:
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| metric | result |
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| -------------- | ----------: |
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| index build | 32.604 ms |
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| candidates p50 | 72 / 15,000 |
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| candidates p95 | 75 / 15,000 |
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| query p50 | 0.295 ms |
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| query p95 | 0.431 ms |
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| p95 culling | 99.50% |
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These values are one-orb observations, not performance guarantees. Candidate
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counts and the 90% ratio are deterministic; elapsed times vary by host load.
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