{
  "protocol": {
    "size": "1152x640",
    "frames": 124,
    "fps": 24,
    "seeds": [
      5214,
      5221,
      5228
    ],
    "stack": "MiniMax H3 INT8 diffusion + turbo LoRA 4 step + ComfyUI standard BlockSparseAttention SLA keep 10%",
    "old": "ComfyUI 0.35.0 + FP16 video VAE",
    "new": "ComfyUI 0.36.0 + INT8 video VAE + --fast fp16_accumulation",
    "common_flags": [
      "--disable-pinned-memory"
    ],
    "measurement": "ComfyUI execution_start to execution_success, including MP4 save, excluding queue wait; first run on each server is warm-up"
  },
  "historical_best": {
    "total_s": 54.4,
    "keep_percent": 5,
    "note": "Earlier different-day two-run comparison; JevSparseAttention uniform keep 5%; reference only"
  },
  "primary": {
    "old": {
      "n": 3,
      "best_s": 52.983,
      "median_s": 56.407,
      "max_s": 57.989,
      "sampling_median_s": 36.275,
      "video_decode_median_s": 16.599,
      "save_video_median_s": 3.087,
      "total_samples_s": [
        56.407,
        57.989,
        52.983
      ]
    },
    "new": {
      "n": 3,
      "best_s": 42.21,
      "median_s": 43.025,
      "max_s": 43.575,
      "sampling_median_s": 33.212,
      "video_decode_median_s": 5.966,
      "save_video_median_s": 3.544,
      "total_samples_s": [
        43.025,
        43.575,
        42.21
      ]
    }
  },
  "paired": [
    {
      "seed": 5214,
      "old_total_s": 56.407,
      "new_total_s": 43.025,
      "saved_s": 13.382,
      "old_sampling_s": 36.275,
      "new_sampling_s": 33.212,
      "old_decode_s": 16.599,
      "new_decode_s": 5.966
    },
    {
      "seed": 5221,
      "old_total_s": 57.989,
      "new_total_s": 43.575,
      "saved_s": 14.414,
      "old_sampling_s": 37.945,
      "new_sampling_s": 33.661,
      "old_decode_s": 16.633,
      "new_decode_s": 5.992
    },
    {
      "seed": 5228,
      "old_total_s": 52.983,
      "new_total_s": 42.21,
      "saved_s": 10.773,
      "old_sampling_s": 33.395,
      "new_sampling_s": 32.912,
      "old_decode_s": 16.424,
      "new_decode_s": 5.906
    }
  ],
  "median_saved_s": 13.382,
  "median_speedup": 1.311,
  "best_saved_s": 10.773,
  "historical_best_saved_s": 12.19,
  "diagnostic_initial": {
    "old": {
      "n": 3,
      "best_s": 65.961,
      "median_s": 245.265,
      "max_s": 558.589,
      "sampling_median_s": 127.814,
      "video_decode_median_s": 106.603,
      "save_video_median_s": 3.59,
      "total_samples_s": [
        65.961,
        558.589,
        245.265
      ]
    },
    "new": {
      "n": 3,
      "best_s": 44.05,
      "median_s": 46.57,
      "max_s": 73.821,
      "sampling_median_s": 36.972,
      "video_decode_median_s": 6.101,
      "save_video_median_s": 3.13,
      "total_samples_s": [
        73.821,
        44.05,
        46.57
      ]
    }
  },
  "samples": {
    "old": {
      "path": "media/whole_old_seed5228.mp4",
      "bytes": 1282698,
      "sha256": "d0e749dfc78b68d7689c9410a786e162f5f61492217ec226e4024fa4e9805141"
    },
    "new": {
      "path": "media/whole_new_seed5228.mp4",
      "bytes": 1280598,
      "sha256": "8c5ddf3f9acd46cd8f56812bd6d17e9b0435a72f8b87024ad0dcebe069f3c581"
    }
  },
  "interpretation": "Whole-stack comparison; ComfyUI version, VAE weight and fast flag all change. Sampling also changes, so the full speedup cannot be attributed to the VAE alone. Initial pass retained as diagnostics, not silently deleted."
}