{
  "schemaVersion": 1,
  "scope": "Reanalysis of two synthetic PDF cases from the recorded Chromium and Firefox guide examples. No new browser measurement, speed test, independent comparison or representative quality score is claimed.",
  "sourceEvidence": {
    "path": "src/content/guide-example-results-iteration5.json",
    "sha256": "2538b8fe5a6978b379b5307f539093799d0262726c36c5cb95c78f64351d3000",
    "generatedAt": "2026-09-07T17:14:55.955Z"
  },
  "sourceVerifier": "scripts/verify-guide-examples-iteration5.mjs",
  "benchmarkVerifier": "scripts/verify-compression-benchmark.mjs",
  "targetBytes": 204800,
  "maximumRequestedDpi": 150,
  "formula": "100 * (inputBytes - outputBytes) / inputBytes",
  "samples": [
    {
      "href": "/samples/iteration5/compression-example.pdf",
      "description": "One A4 synthetic page with a deterministic texture and selectable title; designed to exceed 200 KB.",
      "bytes": 1174106,
      "sha256": "2a755df448bc25f7aa6b19eb9a6f618d10cd0e6af419b0b22ae7294169b05b4d"
    },
    {
      "href": "/samples/device-document-lab.pdf",
      "description": "Five-page synthetic A4 document with labels, one filled text field and an illustration.",
      "bytes": 50317,
      "sha256": "a56f902b96b86968a022fbc09d8bec1548c9af71c62ac74def0751590094535e"
    }
  ],
  "runs": [
    {
      "engine": "chromium",
      "browserVersion": "151.0.7922.34",
      "platform": "linux",
      "measuredAt": "2026-09-07T17:14:32.906Z",
      "rasterized": {
        "inputHref": "/samples/iteration5/compression-example.pdf",
        "outputHref": "/samples/iteration5/results/compress-pdf.pdf",
        "inputBytes": 1174106,
        "outputBytes": 198161,
        "outputSha256": "7dd08c2c4910e7a9496a2e69c66735a821fb5940843732267bd85ab18fb17f60",
        "savedBytes": 975945,
        "reductionPercent": 83.12239269708186,
        "reportedRasterQuality": "Up to 120 DPI · 63% JPEG",
        "pages": 1,
        "hasExtractableText": false,
        "targetMet": true
      },
      "unchanged": {
        "inputAndOutputHref": "/samples/device-document-lab.pdf",
        "inputBytes": 50317,
        "outputBytes": 50317,
        "outputSha256": "a56f902b96b86968a022fbc09d8bec1548c9af71c62ac74def0751590094535e",
        "savedBytes": 0,
        "reductionPercent": 0,
        "pages": 5,
        "hasExtractableText": true,
        "formFields": 1,
        "targetMet": true,
        "proof": "The original browser verifier asserted byte equality for the downloaded already-fitting result. The same downloadable file therefore represents both input and unchanged output; this is not a separate lossless optimization mode."
      }
    },
    {
      "engine": "firefox",
      "browserVersion": "153.0",
      "platform": "linux",
      "measuredAt": "2026-09-07T17:14:55.489Z",
      "rasterized": {
        "inputHref": "/samples/iteration5/compression-example.pdf",
        "outputHref": "/samples/compression-benchmark/firefox-raster-output.pdf",
        "inputBytes": 1174106,
        "outputBytes": 198262,
        "outputSha256": "36d138af6b4dff9080dba5eb1c1e7546aeb4d58804102a2b7ce9b68da731200a",
        "savedBytes": 975844,
        "reductionPercent": 83.11379040733972,
        "reportedRasterQuality": "Up to 120 DPI · 59% JPEG",
        "pages": 1,
        "hasExtractableText": false,
        "targetMet": true
      },
      "unchanged": {
        "inputAndOutputHref": "/samples/device-document-lab.pdf",
        "inputBytes": 50317,
        "outputBytes": 50317,
        "outputSha256": "a56f902b96b86968a022fbc09d8bec1548c9af71c62ac74def0751590094535e",
        "savedBytes": 0,
        "reductionPercent": 0,
        "pages": 5,
        "hasExtractableText": true,
        "formFields": 1,
        "targetMet": true,
        "proof": "The original browser verifier asserted byte equality for the downloaded already-fitting result. The same downloadable file therefore represents both input and unchanged output; this is not a separate lossless optimization mode."
      }
    }
  ]
}