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        "wall_seconds": "11.1466407380000021021",
        "cpu_seconds": "22.2235659999999999991",
        "threads": 2,
        "source_commit": "ab10155d6831a836f6330e1ddc64d7e8cd622670",
        "uni20_commit": "1cb2474eb0a54e13ec7d5f2c1823752020b2425c",
        "compiler": "GNU 13.3.0",
        "platform": "Linux x86_64"
      },
      {
        "order": 4,
        "cutoff": 12,
        "s2": "0.873130455116343415809072260816679329978986819917244295819",
        "s4": "0.21330439868590967437954223722007255756358144556256058191064",
        "sum": "1.0864348538022530901886144980367518875425682654798048777297",
        "two_kernel_error": "4.9883643321168838678800178392480300218343501281611539612347e-56",
        "contour_diagnostic": "3.3670458403238389080647869850457528064097425546752421119196e-35",
        "arithmetic_diagnostic": "8.9273407815871333993479291538340293255661512501491652548044e-35",
        "density_attempts": 768,
        "wall_seconds": "45.4408812859999997613",
        "cpu_seconds": "90.6411099999999999993",
        "threads": 2,
        "source_commit": "ab10155d6831a836f6330e1ddc64d7e8cd622670",
        "uni20_commit": "1cb2474eb0a54e13ec7d5f2c1823752020b2425c",
        "compiler": "GNU 13.3.0",
        "platform": "Linux x86_64"
      },
      {
        "order": 8,
        "cutoff": 12,
        "s2": "0.873130455116343415809072260816679329978986819917244295819",
        "s4": "0.21398636801091998404232457849696249909236629923032028314062",
        "sum": "1.0871168231272633998513968393136418290713531191475645789596",
        "two_kernel_error": "4.9883643321168838678800178392480300218343501281611539612347e-56",
        "contour_diagnostic": "6.5473279981813367113568775455847143388018499182583363628478e-35",
        "arithmetic_diagnostic": "8.9497808422153760238494023151269172249813703802716413102077e-35",
        "density_attempts": 3072,
        "wall_seconds": "178.733360890000000154",
        "cpu_seconds": "357.041631000000000001",
        "threads": 2,
        "source_commit": "ab10155d6831a836f6330e1ddc64d7e8cd622670",
        "uni20_commit": "1cb2474eb0a54e13ec7d5f2c1823752020b2425c",
        "compiler": "GNU 13.3.0",
        "platform": "Linux x86_64"
      },
      {
        "order": 16,
        "cutoff": 12,
        "s2": "0.873130455116343415809072260816679329978986819917244295819",
        "s4": "0.21410080842136672488451815062082485538155903223086302125456",
        "sum": "1.0872312635377101406935904114375041853605458521481073170735",
        "two_kernel_error": "4.9883643321168838678800178392480300218343501281611539612347e-56",
        "contour_diagnostic": "1.1890641384500152812263717408075894018738326919555386433108e-34",
        "arithmetic_diagnostic": "8.9541068572391096845846091716581944853638957312999309106896e-35",
        "density_attempts": 12288,
        "wall_seconds": "685.874934688999999821",
        "cpu_seconds": "1370.76524799999999993",
        "threads": 2,
        "source_commit": "ab10155d6831a836f6330e1ddc64d7e8cd622670",
        "uni20_commit": "1cb2474eb0a54e13ec7d5f2c1823752020b2425c",
        "compiler": "GNU 13.3.0",
        "platform": "Linux x86_64"
      }
    ]
  },
  "reference_note": "Original source and precision-dependent two-spinon tolerance differ. Compare S4, whose quadrature, domain and contour/tolerance controls are unchanged; no claim of identical two-sector query controls or portable speedup.",
  "maximum_s4_relative_difference_128_vs_192": "3.321939129371208995795289742840503739617817392924327367189580644842016870789439590190923377400124848E-38"
}
