Benchmark measurement details

Historical measurement. Not a measurement of the latest release.

View the results · Run benchmarks

Measurement identity	Value
Source revision	dd5b6b8d30e6e7e39e1356be284547f029c07367
Measured at	2026-11-11T05:58:08.668617+00:00
Result status	completed
Source document SHA-256	0311c968ea3aa7c0f104e85fe86482bbabae808f60ad8a6fe89acdd1fe5c4d8c
Policy	Observational codec comparison; no cross-machine regression budget.
platform	macOS-15.8.2-arm64-arm-64bit
machine	arm64
rustc	rustc 1.96.1 (31fca3adb 2026-06-26) binary: rustc commit-hash: 31fca3adb283cc9dfd56b49cdee9a96eb9c96ffd commit-date: 2026-06-26 host: aarch64-apple-darwin release: 1.96.1 LLVM version: 22.1.2
cc	Apple clang version 17.0.0 (clang-1700.0.13.5) Target: arm64-apple-darwin24.6.0 Thread model: posix InstalledDir: /Applications/Xcode_16.4.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
python	3.12.10 (v3.12.10:0cc81280367, Apr 8 2025, 08:46:59) [Clang 13.0.0 (clang-1300.0.29.30)]

Download the public measurement data. This is a presentation snapshot, not the full source receipt. It preserves the original report hash and numerical observations; hostnames, local paths, and internal traces are omitted.

• JPEG only. This does not measure other image codecs or general image processing.
• CMYK uses different public sample conventions in Pillow and TurboJPEG; unequal output hashes are not automatically codec errors.
• Spread is not present in the summary CSV. It is unavailable here rather than inferred from the medians.

Full measurements

Workload	Subject	Median µs	P90 µs	P95 µs	Samples	Result / correctness	Requested → actual	Terminal receipt
encode.rgb-8-q85-420	image-slash-star	2.875	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-8-q85-420	libjpeg-turbo	5.958	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-32-q85-420	image-slash-star	5.250	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-32-q85-420	libjpeg-turbo	8.583	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-63x65-q85-420	image-slash-star	19.875	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-63x65-q85-420	libjpeg-turbo	21.917	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q10-420	image-slash-star	47.708	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q10-420	libjpeg-turbo	35.041	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q50-420	image-slash-star	63.042	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q50-420	libjpeg-turbo	48.416	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-420	image-slash-star	81.833	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-420	libjpeg-turbo	68.292	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q100-420	image-slash-star	100.666	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q100-420	libjpeg-turbo	82.666	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-512-q10-420	image-slash-star	1,027.834	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-512-q10-420	libjpeg-turbo	554.125	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-512-q85-420	image-slash-star	1,918.625	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-512-q85-420	libjpeg-turbo	1,104.000	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-1024-q85-420	image-slash-star	7,376.041	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-1024-q85-420	libjpeg-turbo	4,518.959	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-422	image-slash-star	136.916	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-422	libjpeg-turbo	95.166	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-444	image-slash-star	213.042	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-444	libjpeg-turbo	143.291	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-optimized	image-slash-star	211.791	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-optimized	libjpeg-turbo	219.916	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-progressive	image-slash-star	683.875	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-progressive	libjpeg-turbo	691.042	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-restart4	image-slash-star	80.208	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-128-q85-restart4	libjpeg-turbo	67.667	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.gray-128-q85	image-slash-star	43.459	Not measured	Not measured	5	completed; output hash match: False; byte length match: True	native → native	Not applicable
encode.gray-128-q85	libjpeg-turbo	54.250	Not measured	Not measured	5	completed; output hash match: False; byte length match: True	native → native	Not applicable
encode.gray-512-q85	image-slash-star	998.459	Not measured	Not measured	5	completed; output hash match: False; byte length match: True	native → native	Not applicable
encode.gray-512-q85	libjpeg-turbo	860.584	Not measured	Not measured	5	completed; output hash match: False; byte length match: True	native → native	Not applicable
encode.cmyk-128-q85	image-slash-star	295.625	Not measured	Not measured	5	completed; output hash match: False; byte length match: False	native → native	Not applicable
encode.cmyk-128-q85	libjpeg-turbo	184.541	Not measured	Not measured	5	completed; output hash match: False; byte length match: False	native → native	Not applicable
encode.cmyk-512-q85	image-slash-star	4,974.541	Not measured	Not measured	5	completed; output hash match: False; byte length match: False	native → native	Not applicable
encode.cmyk-512-q85	libjpeg-turbo	3,081.667	Not measured	Not measured	5	completed; output hash match: False; byte length match: False	native → native	Not applicable
encode.rgb-127x129-q85-420	image-slash-star	92.416	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.rgb-127x129-q85-420	libjpeg-turbo	72.875	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-8-q85-420	image-slash-star	1.833	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-8-q85-420	libjpeg-turbo	4.833	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-32-q85-420	image-slash-star	7.709	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-32-q85-420	libjpeg-turbo	11.458	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-63x65-q85-420	image-slash-star	29.500	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-63x65-q85-420	libjpeg-turbo	35.500	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q10-420	image-slash-star	43.250	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q10-420	libjpeg-turbo	32.792	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q50-420	image-slash-star	73.708	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q50-420	libjpeg-turbo	76.042	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-420	image-slash-star	107.375	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-420	libjpeg-turbo	116.792	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q100-420	image-slash-star	183.834	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q100-420	libjpeg-turbo	155.791	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-512-q10-420	image-slash-star	725.667	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-512-q10-420	libjpeg-turbo	537.500	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-512-q85-420	image-slash-star	2,060.417	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-512-q85-420	libjpeg-turbo	1,917.833	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-1024-q85-420	image-slash-star	9,089.958	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-1024-q85-420	libjpeg-turbo	7,891.167	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-422	image-slash-star	159.500	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-422	libjpeg-turbo	155.708	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-444	image-slash-star	271.292	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-444	libjpeg-turbo	236.416	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-optimized	image-slash-star	149.042	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-optimized	libjpeg-turbo	112.875	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-progressive	image-slash-star	343.750	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-progressive	libjpeg-turbo	311.000	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-restart4	image-slash-star	119.167	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-128-q85-restart4	libjpeg-turbo	129.208	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.gray-128-q85	image-slash-star	88.000	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.gray-128-q85	libjpeg-turbo	84.375	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.gray-512-q85	image-slash-star	1,749.875	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.gray-512-q85	libjpeg-turbo	1,460.625	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.cmyk-128-q85	image-slash-star	404.750	Not measured	Not measured	5	completed; output hash match: False; byte length match: True	native → native	Not applicable
decode.cmyk-128-q85	libjpeg-turbo	355.792	Not measured	Not measured	5	completed; output hash match: False; byte length match: True	native → native	Not applicable
decode.cmyk-512-q85	image-slash-star	6,926.250	Not measured	Not measured	5	completed; output hash match: False; byte length match: True	native → native	Not applicable
decode.cmyk-512-q85	libjpeg-turbo	5,960.083	Not measured	Not measured	5	completed; output hash match: False; byte length match: True	native → native	Not applicable
decode.rgb-127x129-q85-420	image-slash-star	120.584	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.rgb-127x129-q85-420	libjpeg-turbo	121.708	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable

Workload boundaries

Repeat counts, dimensions, modes, and cache states are retained per workload:

encode.rgb-8-q85-420

Sample unit: round median.

{
  "context": {
    "width": "8",
    "height": "8",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 20000,
    "aggregation": "median of round medians"
  }
}

encode.rgb-32-q85-420

Sample unit: round median.

{
  "context": {
    "width": "32",
    "height": "32",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 15000,
    "aggregation": "median of round medians"
  }
}

encode.rgb-63x65-q85-420

Sample unit: round median.

{
  "context": {
    "width": "63",
    "height": "65",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 8000,
    "aggregation": "median of round medians"
  }
}

encode.rgb-128-q10-420

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "10",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 4000,
    "aggregation": "median of round medians"
  }
}

encode.rgb-128-q50-420

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "50",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 4000,
    "aggregation": "median of round medians"
  }
}

encode.rgb-128-q85-420

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 4000,
    "aggregation": "median of round medians"
  }
}

encode.rgb-128-q100-420

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "100",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 3000,
    "aggregation": "median of round medians"
  }
}

encode.rgb-512-q10-420

Sample unit: round median.

{
  "context": {
    "width": "512",
    "height": "512",
    "mode": "rgb",
    "quality": "10",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 300,
    "aggregation": "median of round medians"
  }
}

encode.rgb-512-q85-420

Sample unit: round median.

{
  "context": {
    "width": "512",
    "height": "512",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 200,
    "aggregation": "median of round medians"
  }
}

encode.rgb-1024-q85-420

Sample unit: round median.

{
  "context": {
    "width": "1024",
    "height": "1024",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 50,
    "aggregation": "median of round medians"
  }
}

encode.rgb-128-q85-422

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "422",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 3000,
    "aggregation": "median of round medians"
  }
}

encode.rgb-128-q85-444

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "444",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 2000,
    "aggregation": "median of round medians"
  }
}

encode.rgb-128-q85-optimized

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "1",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 1500,
    "aggregation": "median of round medians"
  }
}

encode.rgb-128-q85-progressive

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "1",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 500,
    "aggregation": "median of round medians"
  }
}

encode.rgb-128-q85-restart4

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "4"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 3000,
    "aggregation": "median of round medians"
  }
}

encode.gray-128-q85

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "gray",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 3000,
    "aggregation": "median of round medians"
  }
}

encode.gray-512-q85

Sample unit: round median.

{
  "context": {
    "width": "512",
    "height": "512",
    "mode": "gray",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 300,
    "aggregation": "median of round medians"
  }
}

encode.cmyk-128-q85

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "cmyk",
    "quality": "85",
    "subsampling": "444",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 1000,
    "aggregation": "median of round medians"
  }
}

encode.cmyk-512-q85

Sample unit: round median.

{
  "context": {
    "width": "512",
    "height": "512",
    "mode": "cmyk",
    "quality": "85",
    "subsampling": "444",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 100,
    "aggregation": "median of round medians"
  }
}

encode.rgb-127x129-q85-420

Sample unit: round median.

{
  "context": {
    "width": "127",
    "height": "129",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 3000,
    "aggregation": "median of round medians"
  }
}

decode.rgb-8-q85-420

Sample unit: round median.

{
  "context": {
    "width": "8",
    "height": "8",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 20000,
    "aggregation": "median of round medians"
  }
}

decode.rgb-32-q85-420

Sample unit: round median.

{
  "context": {
    "width": "32",
    "height": "32",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 15000,
    "aggregation": "median of round medians"
  }
}

decode.rgb-63x65-q85-420

Sample unit: round median.

{
  "context": {
    "width": "63",
    "height": "65",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 8000,
    "aggregation": "median of round medians"
  }
}

decode.rgb-128-q10-420

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "10",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 4000,
    "aggregation": "median of round medians"
  }
}

decode.rgb-128-q50-420

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "50",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 4000,
    "aggregation": "median of round medians"
  }
}

decode.rgb-128-q85-420

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 4000,
    "aggregation": "median of round medians"
  }
}

decode.rgb-128-q100-420

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "100",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 3000,
    "aggregation": "median of round medians"
  }
}

decode.rgb-512-q10-420

Sample unit: round median.

{
  "context": {
    "width": "512",
    "height": "512",
    "mode": "rgb",
    "quality": "10",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 300,
    "aggregation": "median of round medians"
  }
}

decode.rgb-512-q85-420

Sample unit: round median.

{
  "context": {
    "width": "512",
    "height": "512",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 200,
    "aggregation": "median of round medians"
  }
}

decode.rgb-1024-q85-420

Sample unit: round median.

{
  "context": {
    "width": "1024",
    "height": "1024",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 50,
    "aggregation": "median of round medians"
  }
}

decode.rgb-128-q85-422

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "422",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 3000,
    "aggregation": "median of round medians"
  }
}

decode.rgb-128-q85-444

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "444",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 2000,
    "aggregation": "median of round medians"
  }
}

decode.rgb-128-q85-optimized

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "1",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 1500,
    "aggregation": "median of round medians"
  }
}

decode.rgb-128-q85-progressive

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "1",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 500,
    "aggregation": "median of round medians"
  }
}

decode.rgb-128-q85-restart4

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "4"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 3000,
    "aggregation": "median of round medians"
  }
}

decode.gray-128-q85

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "gray",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 3000,
    "aggregation": "median of round medians"
  }
}

decode.gray-512-q85

Sample unit: round median.

{
  "context": {
    "width": "512",
    "height": "512",
    "mode": "gray",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 300,
    "aggregation": "median of round medians"
  }
}

decode.cmyk-128-q85

Sample unit: round median.

{
  "context": {
    "width": "128",
    "height": "128",
    "mode": "cmyk",
    "quality": "85",
    "subsampling": "444",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 1000,
    "aggregation": "median of round medians"
  }
}

decode.cmyk-512-q85

Sample unit: round median.

{
  "context": {
    "width": "512",
    "height": "512",
    "mode": "cmyk",
    "quality": "85",
    "subsampling": "444",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 100,
    "aggregation": "median of round medians"
  }
}

decode.rgb-127x129-q85-420

Sample unit: round median.

{
  "context": {
    "width": "127",
    "height": "129",
    "mode": "rgb",
    "quality": "85",
    "subsampling": "420",
    "progressive": "0",
    "optimize": "0",
    "restart_rows": "0"
  },
  "measurement_policy": {
    "boundary": "public codec operation including context/output lifetime",
    "iterations_per_round": 3000,
    "aggregation": "median of round medians"
  }
}

Reproduce and interpret

Use the benchmark protocol. Correctness, native dispatch, timing regressions, process memory, and artifact size are separate claims.