{
  "title": "Controlled local Buildbarn queue-capacity experiment",
  "recordedDate": "2026-09-08",
  "actor": "Codex coding client using Hermetiq MCP and local terminal access",
  "scope": "Synthetic waiting workload in one local Buildbarn worker, not a customer or production benchmark.",
  "queueDefinition": "workerStartTimestamp minus queuedTimestamp from Buildbarn ExecuteResponse, averaged over the 16 independent waiting actions in each run; verification action excluded.",
  "executionDefinition": "executionCompletedTimestamp minus executionStartTimestamp for the same 16 actions.",
  "medianBeforeQueueSeconds": 7.893954,
  "medianAfterQueueSeconds": 1.809266,
  "runs": [
    {
      "id": "baseline-1",
      "phase": "baseline",
      "slots": 1,
      "invocationId": "83413e64-1f20-4a5f-a05e-65a3eef4f4b9",
      "startedAt": "2026-09-08T14:05:07.763971+00:00",
      "finishedAt": "2026-09-08T14:05:27.665905+00:00",
      "processWallSeconds": 19.902347,
      "bazelElapsedSeconds": 18.4,
      "bazelCriticalPathSeconds": 16.96,
      "bepInvocationSeconds": 17.806,
      "meanQueueSeconds": 7.893954,
      "meanExecutionSeconds": 1.014649,
      "queueSampleCount": 16,
      "remoteExecutions": 17,
      "remoteCacheHits": 0,
      "exitCode": 0
    },
    {
      "id": "baseline-2",
      "phase": "baseline",
      "slots": 1,
      "invocationId": "120999b4-22e8-415d-8ead-3fe80233824c",
      "startedAt": "2026-09-08T14:05:47.188620+00:00",
      "finishedAt": "2026-09-08T14:06:07.244745+00:00",
      "processWallSeconds": 20.056586,
      "bazelElapsedSeconds": 18.358,
      "bazelCriticalPathSeconds": 16.95,
      "bepInvocationSeconds": 17.81,
      "meanQueueSeconds": 7.885843,
      "meanExecutionSeconds": 1.014484,
      "queueSampleCount": 16,
      "remoteExecutions": 17,
      "remoteCacheHits": 0,
      "exitCode": 0
    },
    {
      "id": "baseline-3",
      "phase": "baseline",
      "slots": 1,
      "invocationId": "f702b9c5-10a5-419b-b770-29d62ffd0539",
      "startedAt": "2026-09-08T14:06:40.492371+00:00",
      "finishedAt": "2026-09-08T14:07:01.139382+00:00",
      "processWallSeconds": 20.647383,
      "bazelElapsedSeconds": 19.089,
      "bazelCriticalPathSeconds": 17.15,
      "bepInvocationSeconds": 18.253,
      "meanQueueSeconds": 7.905235,
      "meanExecutionSeconds": 1.015866,
      "queueSampleCount": 16,
      "remoteExecutions": 17,
      "remoteCacheHits": 0,
      "exitCode": 0
    },
    {
      "id": "fixed-1",
      "phase": "fixed",
      "slots": 4,
      "invocationId": "aa501c5a-4fd8-4d5d-8197-c4349855ab7f",
      "startedAt": "2026-09-08T14:07:16.519109+00:00",
      "finishedAt": "2026-09-08T14:07:24.161171+00:00",
      "processWallSeconds": 7.641868,
      "bazelElapsedSeconds": 6.165,
      "bazelCriticalPathSeconds": 4.64,
      "bepInvocationSeconds": 5.495,
      "meanQueueSeconds": 1.655201,
      "meanExecutionSeconds": 1.038829,
      "queueSampleCount": 16,
      "remoteExecutions": 17,
      "remoteCacheHits": 0,
      "exitCode": 0
    },
    {
      "id": "fixed-2",
      "phase": "fixed",
      "slots": 4,
      "invocationId": "37cc45ad-f6ec-4bff-9962-d771e8573c9d",
      "startedAt": "2026-09-08T14:07:32.812759+00:00",
      "finishedAt": "2026-09-08T14:07:40.767914+00:00",
      "processWallSeconds": 7.955241,
      "bazelElapsedSeconds": 6.627,
      "bazelCriticalPathSeconds": 4.81,
      "bepInvocationSeconds": 6.125,
      "meanQueueSeconds": 1.809266,
      "meanExecutionSeconds": 1.057227,
      "queueSampleCount": 16,
      "remoteExecutions": 17,
      "remoteCacheHits": 0,
      "exitCode": 0
    },
    {
      "id": "fixed-3",
      "phase": "fixed",
      "slots": 4,
      "invocationId": "bcdf1d36-a9f9-4707-b1ff-e5120eedd21e",
      "startedAt": "2026-09-08T16:44:47.979483+00:00",
      "finishedAt": "2026-09-08T16:45:28.489077+00:00",
      "processWallSeconds": 40.506617,
      "bazelElapsedSeconds": 19.435,
      "bazelCriticalPathSeconds": 7.47,
      "bepInvocationSeconds": 15.182,
      "meanQueueSeconds": 2.446663,
      "meanExecutionSeconds": 1.208559,
      "queueSampleCount": 16,
      "remoteExecutions": 17,
      "remoteCacheHits": 0,
      "exitCode": 0
    }
  ],
  "interruption": "The third fixed run resumed after a pause, about 2 hours 37 minutes after fixed-2. All six runs are retained. Host conditions were not measured or held constant across that pause; the cause of the slower total time is not established.",
  "verifiedOutput": {
    "path": "verified.txt",
    "sizeBytes": 48,
    "sha256": "eb3becdaa9f75ea4c63169dba168dd18e273eed64e0f4c4ad694cf63ac9418f6"
  }
}