{
  "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": "2026-11-12T04:04:36.720Z",
  "finished_at_utc": "2026-11-12T04:04:41.701Z",
  "providers": [
    {
      "id": "cloudflare",
      "env_vars": [
        "CF_BENCH_URL",
        "CF_BENCH_TOKEN"
      ],
      "requires_payment_method": true,
      "note": "Timed from this host through the bench Worker in ./cloudflare, so it includes one extra laptop-to-Worker hop.",
      "status": "measured",
      "reason": null,
      "replicates": [
        {
          "index": 1,
          "ok": true,
          "sandbox_id": "ttfr-f5b50493-68be-482d-ab0f-66e5318f1a96",
          "image": "cloudflare/debian-trixie (lite)",
          "spawn_ms": 716.3,
          "cold_start_ms": 888.4,
          "time_to_first_exec_ms": 172,
          "verify_ms": 187,
          "teardown_ms": 227.7,
          "first_command_stdout": "ok",
          "uname": "Linux 0e8e7315cbd15859bfe7ff487196b5e598f80cd36656a83a75800834a32063e 6.18.56-cloudflare-microvm-2026.10.9 #1 SMP PREEMPT_DYNAMIC Mon Sep 27 00:00:00 UTC 2010 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 2,
          "ok": true,
          "sandbox_id": "ttfr-a42d766a-c3ba-45bb-84df-b587d50e5d49",
          "image": "cloudflare/debian-trixie (lite)",
          "spawn_ms": 301.4,
          "cold_start_ms": 478.2,
          "time_to_first_exec_ms": 176.8,
          "verify_ms": 189,
          "teardown_ms": 198.8,
          "first_command_stdout": "ok",
          "uname": "Linux 687d7a8fe055f43e0e29a825a1aaf3a706edf019a0d04d36150af5002cb6484 6.18.56-cloudflare-microvm-2026.10.9 #1 SMP PREEMPT_DYNAMIC Mon Sep 27 00:00:00 UTC 2010 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 3,
          "ok": true,
          "sandbox_id": "ttfr-89a2bca7-fa8c-4469-bc1e-8d8781d5ff03",
          "image": "cloudflare/debian-trixie (lite)",
          "spawn_ms": 310.7,
          "cold_start_ms": 483,
          "time_to_first_exec_ms": 172.3,
          "verify_ms": 171.3,
          "teardown_ms": 243.7,
          "first_command_stdout": "ok",
          "uname": "Linux 37236fd873af3bf06b3d46139815715508a01357ec90c27026ca77e9de31353 6.18.56-cloudflare-microvm-2026.10.9 #1 SMP PREEMPT_DYNAMIC Mon Sep 27 00:00:00 UTC 2010 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 4,
          "ok": true,
          "sandbox_id": "ttfr-644ed22b-bf33-458b-a2df-161b4b3eeced",
          "image": "cloudflare/debian-trixie (lite)",
          "spawn_ms": 403.5,
          "cold_start_ms": 606.1,
          "time_to_first_exec_ms": 202.5,
          "verify_ms": 182.2,
          "teardown_ms": 235,
          "first_command_stdout": "ok",
          "uname": "Linux 30488d2ff87a6e26f52e2a2d096509c1e232b8141d27080bc75fef970229d55 6.18.56-cloudflare-microvm-2026.10.9 #1 SMP PREEMPT_DYNAMIC Mon Sep 27 00:00:00 UTC 2010 x86_64 GNU/Linux",
          "readiness_attempts": 1,
          "error": null,
          "teardown_error": null
        },
        {
          "index": 5,
          "ok": true,
          "sandbox_id": "ttfr-4c825b9d-1297-4302-998d-7fea8fdbcac3",
          "image": "cloudflare/debian-trixie (lite)",
          "spawn_ms": 297.7,
          "cold_start_ms": 467.1,
          "time_to_first_exec_ms": 169.4,
          "verify_ms": 160.1,
          "teardown_ms": 261.3,
          "first_command_stdout": "ok",
          "uname": "Linux 5bd39c7ed8f6c43ca0aaf004acc7ef3203118f2008594689d614ecb6cce9d57 6.18.56-cloudflare-microvm-2026.10.9 #1 SMP PREEMPT_DYNAMIC Mon Sep 27 00:00:00 UTC 2010 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": 467.1,
          "p50": 483,
          "max": 888.4
        },
        "spawn_ms": {
          "n": 5,
          "min": 297.7,
          "p50": 310.7,
          "max": 716.3
        },
        "time_to_first_exec_ms": {
          "n": 5,
          "min": 169.4,
          "p50": 172.3,
          "max": 202.5
        },
        "teardown_ms": {
          "n": 5,
          "min": 198.8,
          "p50": 235,
          "max": 261.3
        }
      }
    }
  ]
}