{
  "date": "2026-10-28",
  "scope": "Sandbox SDK allocation to first result; fresh client and temporary application per pair",
  "rounds": 6,
  "pairs": 12,
  "rows": [
    {
      "round": 0,
      "repetition": 0,
      "measurements": [
        {
          "phase": "first",
          "seconds": 0.19847645610570908,
          "allocation_s": 0.0011633802205324173
        },
        {
          "phase": "reuse",
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        }
      ]
    },
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      "round": 0,
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      "measurements": [
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          "allocation_s": 0.00113685242831707
        },
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      ]
    },
    {
      "round": 1,
      "repetition": 1,
      "measurements": [
        {
          "phase": "first",
          "seconds": 0.19343142583966255,
          "allocation_s": 0.0010823700577020645
        },
        {
          "phase": "reuse",
          "seconds": 0.08862543478608131,
          "allocation_s": 0.0010019782930612564
        }
      ]
    },
    {
      "round": 1,
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      "measurements": [
        {
          "phase": "first",
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      ]
    },
    {
      "round": 2,
      "repetition": 0,
      "measurements": [
        {
          "phase": "first",
          "seconds": 0.18503118492662907,
          "allocation_s": 0.0012055020779371262
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    },
    {
      "round": 2,
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      "measurements": [
        {
          "phase": "first",
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    {
      "round": 3,
      "repetition": 1,
      "measurements": [
        {
          "phase": "first",
          "seconds": 0.18450632318854332,
          "allocation_s": 0.0011928565800189972
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        {
          "phase": "reuse",
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          "allocation_s": 0.001100407913327217
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    },
    {
      "round": 3,
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      "measurements": [
        {
          "phase": "first",
          "seconds": 0.1842141542583704,
          "allocation_s": 0.0012744497507810593
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        {
          "phase": "reuse",
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          "allocation_s": 0.000985449180006981
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      ]
    },
    {
      "round": 4,
      "repetition": 0,
      "measurements": [
        {
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          "seconds": 0.2067279163748026,
          "allocation_s": 0.0011640451848506927
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        {
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    {
      "round": 4,
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      "measurements": [
        {
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    },
    {
      "round": 5,
      "repetition": 1,
      "measurements": [
        {
          "phase": "first",
          "seconds": 0.20149866864085197,
          "allocation_s": 0.0010857321321964264
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        {
          "phase": "reuse",
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          "allocation_s": 0.001052243635058403
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      ]
    },
    {
      "round": 5,
      "repetition": 0,
      "measurements": [
        {
          "phase": "first",
          "seconds": 0.19819675385951996,
          "allocation_s": 0.0012688692659139633
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        {
          "phase": "reuse",
          "seconds": 0.09239209070801735,
          "allocation_s": 0.0010290667414665222
        }
      ]
    }
  ],
  "summary": [
    {
      "phase": "first",
      "median_s": 0.1909269392490387,
      "range_s": [
        0.1681855171918869,
        0.2067279163748026
      ],
      "values_s": [
        0.19847645610570908,
        0.1681855171918869,
        0.19343142583966255,
        0.18842245265841484,
        0.18503118492662907,
        0.16868930868804455,
        0.18450632318854332,
        0.1842141542583704,
        0.2067279163748026,
        0.19718152657151222,
        0.20149866864085197,
        0.19819675385951996
      ]
    },
    {
      "phase": "reuse",
      "median_s": 0.08206908125430346,
      "range_s": [
        0.06996628269553185,
        0.09239209070801735
      ],
      "values_s": [
        0.08102789893746376,
        0.0886501669883728,
        0.08862543478608131,
        0.0748346671462059,
        0.06996628269553185,
        0.0825491901487112,
        0.0754900798201561,
        0.07307912409305573,
        0.08518438972532749,
        0.08570954948663712,
        0.0815889723598957,
        0.09239209070801735
      ]
    }
  ],
  "image": "python:3.12-slim@sha256:6b25cbe6577518889d553cdd5a5da97d259348d8f6e45b527dd731caaba27a07",
  "worker_revision": "6dc0ed2eb66f82c4e4cc2b9c34192017ae361196",
  "application_delay_release_seconds": 3,
  "worker_cpu_request": 1,
  "worker_memory_request_bytes": 536870912,
  "client_instrumented": true,
  "worker_tracing": false,
  "existing_sdk_connection_established_before_timing": true,
  "image_cache": "Index alias prewarmed and verified on all 11 workers before measurements; all 12 traced first-use samples confirmed alias presence",
  "validation": {
    "outputs_checked": true,
    "exact_executor_reuse_confirmed": true,
    "independent_summary_match": true,
    "owned_sessions_and_executors_cleaned": true,
    "namespace_deleted": true,
    "raw_evidence_sha256": "4f72763bcebbd492abe16addfcdd2c86a1578e7121696188d985c6398d33808e"
  },
  "limitations": [
    "Sandbox only; does not estimate Session startup.",
    "Prewarmed worker-local aliases may need rebuilding after pod replacement.",
    "Twelve observations do not establish a tail-latency guarantee.",
    "Temporary application uses a three-second executor release delay; reuse was verified by executor ID.",
    "SDK client timing hooks are enabled; no worker tracing wrapper is used for these control samples."
  ]
}