{
  "_readme": [
    "The committed numbers for DarkRoom's benchmark suite (docs/requirements.md §8).",
    "Produced and checked by `cargo run --release -p dr-bench`; docs/benchmarks.md explains each metric.",
    "",
    "Two gates, and they are not the same gate. `budget` is the requirement's own threshold and never moves.",
    "`recorded` is what the reference desktop last measured, and a run that drifts past `tolerance` beyond it",
    "fails the build even while still inside the budget — which is how most performance rot actually arrives.",
    "",
    "`recorded` is null on every metric because nobody has run the suite yet. That is deliberate: writing",
    "plausible-looking figures here would make every later comparison a comparison against a guess. Run",
    "`cargo run --release -p dr-bench -- record --reference` on the reference desktop and commit the diff.",
    "Until then the budget gate works and the regression gate says, in the report, that it cannot.",
    "",
    "`machine_sensitive` says whether a budget is a statement about a machine as much as about the code.",
    "Those budgets are asserted only under --reference: §8 names the reference desktop, and a two-core CI",
    "container cannot speak to a target written for twenty-four threads. Asserting one there would produce a",
    "red gate everybody learns to ignore, which is the trap core/dr-gpu/tests/frame_budget.rs already avoids.",
    "",
    "Several metrics carry a requirement ID with a qualifier. Read those literally. NFR-P7's budget here is",
    "checked against the encode half of an export only — no GPU render is in the figure — so it can fail the",
    "requirement and cannot pass it, and no TRACES tag claims otherwise. NFR-P8 has no budget at all yet,",
    "because nobody has decided how much of its 500 MB belongs to the catalog layer; this records the number",
    "that decision needs."
  ],
  "tolerance": 0.15,
  "recorded_on": null,
  "recorded_at_unix": null,
  "fixture": null,
  "metrics": {
    "catalog_filtered_ms": {
      "requirement": "FR-CAT-6",
      "what": "Count plus first window under a rating filter, which compiles to a correlated subquery over versions.",
      "unit": "ms",
      "direction": "lower_is_better",
      "machine_sensitive": true,
      "budget": null,
      "recorded": null
    },
    "catalog_idle_rss_mb": {
      "requirement": "NFR-P8 (the catalog layer's share only — no toolkit, no adapter, no decode cache)",
      "what": "Resident memory of a process that opened the 50k catalog and scrolled ten thousand rows.",
      "unit": "MB",
      "direction": "lower_is_better",
      "machine_sensitive": false,
      "budget": null,
      "recorded": null
    },
    "catalog_open_ms": {
      "requirement": "NFR-P1",
      "what": "Catalog::open plus the count, first window and timeline the grid cannot paint without.",
      "unit": "ms",
      "direction": "lower_is_better",
      "machine_sensitive": false,
      "budget": 2000.0,
      "recorded": null
    },
    "catalog_open_warm_ms": {
      "requirement": "NFR-P1",
      "what": "The same four calls on a second connection, with SQLite's page cache already warm.",
      "unit": "ms",
      "direction": "lower_is_better",
      "machine_sensitive": false,
      "budget": 2000.0,
      "recorded": null
    },
    "catalog_window_p99_ms": {
      "requirement": "FR-CAT-4",
      "what": "One 400-row grid window at a random offset, p99 of one hundred.",
      "unit": "ms",
      "direction": "lower_is_better",
      "machine_sensitive": true,
      "budget": null,
      "recorded": null
    },
    "export_24mp_long_edge_2048_ms": {
      "requirement": "FR-EXP-3",
      "what": "The web export: resample a 24 MP frame to a 2048 px long edge, sharpen, encode. p99 of five.",
      "unit": "ms",
      "direction": "lower_is_better",
      "machine_sensitive": true,
      "budget": null,
      "recorded": null
    },
    "export_24mp_original_ms": {
      "requirement": "NFR-P7 (the encode half only — the GPU render is not in this figure)",
      "what": "Resample, output-sharpen and JPEG-encode a 24 MP frame at source size. p99 of five.",
      "unit": "ms",
      "direction": "lower_is_better",
      "machine_sensitive": true,
      "budget": 2000.0,
      "recorded": null
    },
    "thumbnail_per_image_p99_ms": {
      "requirement": "NFR-P3",
      "what": "One thumbnail on its own lane: decode the preview, downscale, orient, encode. p99.",
      "unit": "ms",
      "direction": "lower_is_better",
      "machine_sensitive": true,
      "budget": null,
      "recorded": null
    },
    "thumbnail_throughput_ips": {
      "requirement": "NFR-P3",
      "what": "Whole-sweep throughput: 1200 thumbnails through the sweep's chunk-and-lane shape, wall clock.",
      "unit": "img/s",
      "direction": "higher_is_better",
      "machine_sensitive": true,
      "budget": 100.0,
      "recorded": null
    }
  }
}