{
  "schema_version": 1,
  "task": "cold_create_to_first_command",
  "method": {
    "first_command": "echo ok",
    "verify_command": "uname -a",
    "replicates_requested": 5,
    "readiness": {
      "attempts": 40,
      "gap_ms": 250,
      "probe_timeout_ms": 2000
    },
    "definitions": {
      "spawn_ms": "t0 (monotonic, before create) until the provider's create call returns a handle",
      "cold_start_ms": "headline TTFR: t0 until the first `echo ok` exits 0",
      "time_to_first_exec_ms": "create returned until the first `echo ok` exits 0",
      "teardown_ms": "wall time of the provider's destroy call"
    }
  },
  "host": {
    "platform": "darwin 27.0.0",
    "runtime": "bun 1.2.19",
    "timezone": "America/New_York",
    "note": "Numbers include network round trips from this host."
  },
  "started_at_utc": "2026-11-12T17:19:04.851Z",
  "finished_at_utc": "2026-11-12T17:19:11.835Z",
  "providers": [
    {
      "id": "vercel",
      "env_vars": [
        "VERCEL_SANDBOX",
        "VERCEL_TEAM_ID",
        "VERCEL_PROJECT_ID"
      ],
      "requires_payment_method": false,
      "note": "SDK create() is a single POST with no client-side polling. persistent: false, so no snapshot is kept.",
      "status": "measured",
      "reason": null,
      "replicates": [
        {
          "index": 1,
          "ok": true,
          "image": "vercel/sandbox/universal (default)",
          "spawn_ms": 764,
          "cold_start_ms": 1067.1,
          "time_to_first_exec_ms": 303.2,
          "verify_ms": 319.5,
          "teardown_ms": 311.2,
          "first_command_stdout": "ok",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 2,
          "ok": true,
          "image": "vercel/sandbox/universal (default)",
          "spawn_ms": 362,
          "cold_start_ms": 631.9,
          "time_to_first_exec_ms": 269.9,
          "verify_ms": 275.3,
          "teardown_ms": 467,
          "first_command_stdout": "ok",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 3,
          "ok": true,
          "image": "vercel/sandbox/universal (default)",
          "spawn_ms": 358.6,
          "cold_start_ms": 637.8,
          "time_to_first_exec_ms": 279.2,
          "verify_ms": 298.4,
          "teardown_ms": 387.9,
          "first_command_stdout": "ok",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 4,
          "ok": true,
          "image": "vercel/sandbox/universal (default)",
          "spawn_ms": 385.1,
          "cold_start_ms": 661.9,
          "time_to_first_exec_ms": 276.8,
          "verify_ms": 282.5,
          "teardown_ms": 333,
          "first_command_stdout": "ok",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 5,
          "ok": true,
          "image": "vercel/sandbox/universal (default)",
          "spawn_ms": 371.5,
          "cold_start_ms": 698.8,
          "time_to_first_exec_ms": 327.2,
          "verify_ms": 305.5,
          "teardown_ms": 305.7,
          "first_command_stdout": "ok",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        }
      ],
      "summary": {
        "n_ok": 5,
        "n_fail": 0,
        "cold_start_ms": {
          "n": 5,
          "min": 631.9,
          "p50": 661.9,
          "max": 1067.1
        },
        "spawn_ms": {
          "n": 5,
          "min": 358.6,
          "p50": 371.5,
          "max": 764
        },
        "time_to_first_exec_ms": {
          "n": 5,
          "min": 269.9,
          "p50": 279.2,
          "max": 327.2
        },
        "teardown_ms": {
          "n": 5,
          "min": 305.7,
          "p50": 333,
          "max": 467
        }
      }
    }
  ]
}