{
  "groups": [
    {
      "cache_mib": 8,
      "payload_bytes": 8,
      "copy_after_zero": false,
      "throughput_mps": 729.5704398386,
      "throughput_runs_mps": [
        751.491183956,
        752.837274298,
        725.134713714,
        751.57601733,
        666.813009895
      ],
      "p50_ns": 1.258333333334,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 8,
      "payload_bytes": 8,
      "copy_after_zero": true,
      "throughput_mps": 407.9652557932,
      "throughput_runs_mps": [
        407.749258345,
        406.268709944,
        411.978947052,
        409.994972232,
        403.834391393
      ],
      "p50_ns": 2.158333333336,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 8,
      "payload_bytes": 16,
      "copy_after_zero": false,
      "throughput_mps": 92.76179231516,
      "throughput_runs_mps": [
        97.9742981085,
        96.0711298348,
        94.4725312329,
        82.8781382812,
        92.4128641184
      ],
      "p50_ns": 9.866666666674,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 8,
      "payload_bytes": 16,
      "copy_after_zero": true,
      "throughput_mps": 481.85223377840003,
      "throughput_runs_mps": [
        453.243245497,
        537.812783175,
        518.826905388,
        428.021121815,
        471.357113017
      ],
      "p50_ns": 1.300000000002,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 8,
      "payload_bytes": 32,
      "copy_after_zero": false,
      "throughput_mps": 50.49082760398,
      "throughput_runs_mps": [
        51.0538674614,
        49.611110166,
        50.1990190308,
        50.2222023588,
        51.3679390029
      ],
      "p50_ns": 19.91666666666,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 8,
      "payload_bytes": 32,
      "copy_after_zero": true,
      "throughput_mps": 368.89582966020004,
      "throughput_runs_mps": [
        422.781585748,
        294.31312291,
        406.261101085,
        476.369999627,
        244.753338931
      ],
      "p50_ns": 1.6416666666680002,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 8,
      "payload_bytes": 64,
      "copy_after_zero": false,
      "throughput_mps": 281.2620553078,
      "throughput_runs_mps": [
        314.245515999,
        278.590332915,
        256.342903955,
        284.827236046,
        272.304287624
      ],
      "p50_ns": 3.391666666668,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 8,
      "payload_bytes": 64,
      "copy_after_zero": true,
      "throughput_mps": 258.482494319,
      "throughput_runs_mps": [
        217.939721229,
        286.214162838,
        277.648262576,
        282.056313502,
        228.55401145
      ],
      "p50_ns": 3.858333333334,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 256,
      "payload_bytes": 8,
      "copy_after_zero": false,
      "throughput_mps": 673.1106956124,
      "throughput_runs_mps": [
        686.426176341,
        606.727086572,
        669.103317916,
        700.533540355,
        702.763356878
      ],
      "p50_ns": 1.258333333334,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 256,
      "payload_bytes": 8,
      "copy_after_zero": true,
      "throughput_mps": 394.2762159542,
      "throughput_runs_mps": [
        397.793566381,
        394.192876682,
        393.690449152,
        396.843113036,
        388.86107452
      ],
      "p50_ns": 2.208333333332,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 256,
      "payload_bytes": 16,
      "copy_after_zero": false,
      "throughput_mps": 66.48414575251999,
      "throughput_runs_mps": [
        73.274745924,
        44.2986198849,
        73.9683491949,
        70.6624721235,
        70.2165416353
      ],
      "p50_ns": 13.700000000020001,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 256,
      "payload_bytes": 16,
      "copy_after_zero": true,
      "throughput_mps": 360.1804871248,
      "throughput_runs_mps": [
        418.769237212,
        305.723916018,
        293.127625746,
        378.862029549,
        404.419627099
      ],
      "p50_ns": 1.366666666668,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 256,
      "payload_bytes": 32,
      "copy_after_zero": false,
      "throughput_mps": 51.260814498360006,
      "throughput_runs_mps": [
        51.2292895799,
        51.67986486,
        51.1503718632,
        51.3260184655,
        50.9185277232
      ],
      "p50_ns": 19.966666666640002,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 256,
      "payload_bytes": 32,
      "copy_after_zero": true,
      "throughput_mps": 349.0674793366,
      "throughput_runs_mps": [
        356.512606517,
        246.457682218,
        293.583368502,
        389.545896999,
        459.237842447
      ],
      "p50_ns": 2.691666666666,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 256,
      "payload_bytes": 64,
      "copy_after_zero": false,
      "throughput_mps": 134.96089648432002,
      "throughput_runs_mps": [
        239.211564425,
        62.3405612871,
        68.7479139735,
        117.932931023,
        186.571511713
      ],
      "p50_ns": 5.624999999998,
      "failed_write_calls": 0
    },
    {
      "cache_mib": 256,
      "payload_bytes": 64,
      "copy_after_zero": true,
      "throughput_mps": 159.2865308755,
      "throughput_runs_mps": [
        49.6395340845,
        189.484253044,
        208.068189439,
        197.470564001,
        151.770113809
      ],
      "p50_ns": 7.35,
      "failed_write_calls": 0
    }
  ],
  "runs": 176,
  "full_payload_fifo_validated": true,
  "elapsed_seconds": 47.420532417000004,
  "notes": "Same binary and all parameters unchanged except copy_after_zero. Target clearing and memcpy both inside timing; upstream unmodified."
}