{
  "purpose": "Illustrative synthetic size experiment, not a general ranking",
  "date": "2026-10-11",
  "input_bytes_each": 262144,
  "python": "3.14.7",
  "platform": "Linux-7.2.9-1-cachyos-x86_64-with-glibc2.44",
  "zstandard_binding": "0.25.0",
  "libzstd": [
    1,
    5,
    7
  ],
  "brotli": "1.2.0",
  "dictionary": "none trained; Brotli format static dictionary is implicit in decoder",
  "sizes_include": "complete returned compressed streams; shared codec software excluded",
  "samples": {
    "periodic": {
      "sha256": "2312394bd99545d9de131c24efb781e765ac1aec243f2ed9347597a793a415e9",
      "raw_bytes": 262144,
      "byte_histogram_entropy": 8.0,
      "compressed": {
        "zstd-3": {
          "bytes": 291,
          "percent_of_input": 0.1110076904296875,
          "round_trip_exact": true,
          "sha256": "67dec5d68c2c5024fbe69123579cc1ae896b295b1a4403bf97fd1104e665d6b2"
        },
        "zstd-19": {
          "bytes": 292,
          "percent_of_input": 0.11138916015625,
          "round_trip_exact": true,
          "sha256": "a97d79cb7df9b4ab997946ba29b076d470aa5c2d37550f52b0849cb5d8aa4700"
        },
        "brotli-5": {
          "bytes": 260,
          "percent_of_input": 0.09918212890625,
          "round_trip_exact": true,
          "sha256": "6f2e391fd1a5607e6e7d95bfedf2aa1c0779a2f013c634d985ca69c083221390"
        },
        "brotli-11": {
          "bytes": 218,
          "percent_of_input": 0.083160400390625,
          "round_trip_exact": true,
          "sha256": "dd012c1ab6275ef7d553d60bbaa9d9cbc3d981dbc99ff5cd65cdecc03d611e35"
        }
      }
    },
    "telemetry": {
      "sha256": "8dcdb7a7bf1d4c9b8d5ab0f989e54aa10dd190c79a3d2c6470b3885efeffd640",
      "raw_bytes": 262144,
      "byte_histogram_entropy": 4.452733913275091,
      "compressed": {
        "zstd-3": {
          "bytes": 9266,
          "percent_of_input": 3.534698486328125,
          "round_trip_exact": true,
          "sha256": "8f41fa39bc4f960691f169fef98615a537a1694e0129feca7a728ef187dc43dc"
        },
        "zstd-19": {
          "bytes": 7064,
          "percent_of_input": 2.6947021484375,
          "round_trip_exact": true,
          "sha256": "4f193885347384736db01814e3809dbbc897dcf1d7f58a07fbc190ebdcf6a46b"
        },
        "brotli-5": {
          "bytes": 6786,
          "percent_of_input": 2.588653564453125,
          "round_trip_exact": true,
          "sha256": "20c90d3d653a31209ab475999f08355e610d738b41d8e4f23ea13f12cb843d04"
        },
        "brotli-11": {
          "bytes": 4370,
          "percent_of_input": 1.667022705078125,
          "round_trip_exact": true,
          "sha256": "c0aae130fb46811ebde7670ade73ebfa29bdf3dea5c0542b0cf5fefff66540b8"
        }
      }
    },
    "pseudorandom": {
      "sha256": "b9e602d7e687beba9f7eec0e957104258798d23f90b39acf80a1f94848f91922",
      "raw_bytes": 262144,
      "byte_histogram_entropy": 7.999318674653804,
      "compressed": {
        "zstd-3": {
          "bytes": 262159,
          "percent_of_input": 100.00572204589844,
          "round_trip_exact": true,
          "sha256": "8cdf0343a09c5b7b31b43a12b47a498df600e81c671f41efd9a1703369d8f68f"
        },
        "zstd-19": {
          "bytes": 262159,
          "percent_of_input": 100.00572204589844,
          "round_trip_exact": true,
          "sha256": "8cdf0343a09c5b7b31b43a12b47a498df600e81c671f41efd9a1703369d8f68f"
        },
        "brotli-5": {
          "bytes": 262149,
          "percent_of_input": 100.00190734863281,
          "round_trip_exact": true,
          "sha256": "b60e60d94094e2fe22c1139f71541f93dcedf7f4b89c1bbebca486dcef68d02f"
        },
        "brotli-11": {
          "bytes": 262149,
          "percent_of_input": 100.00190734863281,
          "round_trip_exact": true,
          "sha256": "b60e60d94094e2fe22c1139f71541f93dcedf7f4b89c1bbebca486dcef68d02f"
        }
      }
    }
  }
}