{
  "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"
    },
    "attribution": "Metric definitions from StarSling High Performance Sandbox Benchmarks, MIT, Copyright (c) 2026 StarSling. Independent implementation, not official StarSling."
  },
  "host": {
    "platform": "darwin 27.0.0",
    "runtime": "bun 1.2.19",
    "timezone": "America/Denver",
    "note": "Numbers include network round trips from this host. Not comparable to StarSling's pipeline tables (different image and machine shape)."
  },
  "started_at_utc": "2026-11-12T08:56:23.169Z",
  "finished_at_utc": "2026-11-12T08:56:35.653Z",
  "providers": [
    {
      "id": "tensorlake",
      "env_vars": [
        "TENSORLAKE_API_KEY"
      ],
      "requires_payment_method": false,
      "note": "REST API (the TS SDK breaks under Bun). POST /sandboxes waits until running by default, so spawn_ms covers boot. Free tier allows 1 concurrent sandbox.",
      "status": "measured",
      "reason": null,
      "replicates": [
        {
          "index": 1,
          "ok": true,
          "sandbox_id": "le2lo6wqs8oke1uu9y5us",
          "image": "tensorlake default image (tensorlake/ubuntu-minimal)",
          "spawn_ms": 1372.2,
          "cold_start_ms": 2490,
          "time_to_first_exec_ms": 1117.8,
          "verify_ms": 260.6,
          "teardown_ms": 226,
          "first_command_stdout": "ok",
          "uname": "Linux tl-sbx 7.0.7 #1 SMP PREEMPT_DYNAMIC Tue Nov  3 19:09:05 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 2,
          "ok": true,
          "sandbox_id": "tv9o2eqlj2rsjm0yku9nh",
          "image": "tensorlake default image (tensorlake/ubuntu-minimal)",
          "spawn_ms": 876.6,
          "cold_start_ms": 1939.5,
          "time_to_first_exec_ms": 1062.8,
          "verify_ms": 238.2,
          "teardown_ms": 220.8,
          "first_command_stdout": "ok",
          "uname": "Linux tl-sbx 7.0.7 #1 SMP PREEMPT_DYNAMIC Tue Nov  3 19:09:05 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 3,
          "ok": true,
          "sandbox_id": "ryuqyk2fukoyn0v64rryv",
          "image": "tensorlake default image (tensorlake/ubuntu-minimal)",
          "spawn_ms": 851.4,
          "cold_start_ms": 1914.4,
          "time_to_first_exec_ms": 1063,
          "verify_ms": 229.6,
          "teardown_ms": 223.3,
          "first_command_stdout": "ok",
          "uname": "Linux tl-sbx 7.0.7 #1 SMP PREEMPT_DYNAMIC Tue Nov  3 19:09:05 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 4,
          "ok": true,
          "sandbox_id": "n98z2vfivaqp7jga09124",
          "image": "tensorlake default image (tensorlake/ubuntu-minimal)",
          "spawn_ms": 842.3,
          "cold_start_ms": 1895.1,
          "time_to_first_exec_ms": 1052.8,
          "verify_ms": 235.9,
          "teardown_ms": 221.6,
          "first_command_stdout": "ok",
          "uname": "Linux tl-sbx 7.0.7 #1 SMP PREEMPT_DYNAMIC Tue Nov  3 19:09:05 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 5,
          "ok": true,
          "sandbox_id": "oen8d5mzw3mpoftdukko5",
          "image": "tensorlake default image (tensorlake/ubuntu-minimal)",
          "spawn_ms": 851.2,
          "cold_start_ms": 1918.8,
          "time_to_first_exec_ms": 1067.6,
          "verify_ms": 249.1,
          "teardown_ms": 218.9,
          "first_command_stdout": "ok",
          "uname": "Linux tl-sbx 7.0.7 #1 SMP PREEMPT_DYNAMIC Tue Nov  3 19:09:05 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        }
      ],
      "summary": {
        "n_ok": 5,
        "n_fail": 0,
        "cold_start_ms": {
          "n": 5,
          "min": 1895.1,
          "p50": 1918.8,
          "max": 2490
        },
        "spawn_ms": {
          "n": 5,
          "min": 842.3,
          "p50": 851.4,
          "max": 1372.2
        },
        "time_to_first_exec_ms": {
          "n": 5,
          "min": 1052.8,
          "p50": 1063,
          "max": 1117.8
        },
        "teardown_ms": {
          "n": 5,
          "min": 218.9,
          "p50": 221.6,
          "max": 226
        }
      }
    }
  ]
}