{
  "schema_version": 1,
  "timestamp_unix_seconds": 1791637188,
  "environment": {
    "arch": "aarch64",
    "build": "cargo release, compilation excluded",
    "cpu": "Apple M3 Pro",
    "csv_crate": "1.4.0",
    "debug_assertions": "false",
    "os": "macos",
    "os_version": "26.6.1",
    "physical_memory_bytes": "38654705664",
    "python": "Python 3.12.14",
    "rustc": "rustc 1.98.1 (48a229cea 2026-09-01) (Homebrew)"
  },
  "method": [
    "Synthetic assessment-shaped CSV, 11 columns; quoted comma, quote, embedded LF, UTF-8 and optional blank area",
    "Same parse + integer/total validation + category aggregation + normalized SHA-256 workload in all four variants",
    "One fresh process per run; wall time includes process/interpreter startup and reading/parsing/hashing, excludes fixture generation and compilation",
    "One excluded warmup per variant/size; warm filesystem-cache runs, no cache flush or system/process changes",
    "Measured kernel per-child wait4 ru_maxrss; Darwin bytes (Linux KiB normalized to bytes); not allocated-byte estimates or browser memory",
    "Rotate variant order each repetition; sequential children; every run must match generator-derived expected aggregates and canonical content hash",
    "Streaming iterates rows; buffered retains the entire decoded CSV row list through aggregation",
    "Observed min/max are run ranges, not confidence intervals; unrelated applications remain running"
  ],
  "source_sha256": {
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    "Cargo.toml": "3fccbddb4415e863f0d0ca1f86962421bf1e6a2ec4b9f2e9ca4a4c0a481dfca0",
    "python_baseline.py": "12ca921f8871dbab8aa38865980564b7fdd8b4e6721e810e16df2572ef7ecb13",
    "release_executable": "35c4fe419c1345a7670a74b8854d05df7006a9954cbec56e487132283dc2ee7a",
    "src/charts.rs": "1fa11fe874ab600631f0908380ee10180a1b2f07e3fa84c31b5f49673abad3fd",
    "src/main.rs": "1e8060b9948b081100025525013206e09b01222c5933bee9e994ea24fef7e905",
    "test_python_baseline.py": "698fae5bd8a305c0e540d048a5e25aa3242824fba30e70a2ee2d7da60ffd9a76"
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