Benchmark measurement details

Historical measurement. Not a measurement of the latest release.

View the results · Run benchmarks

Measurement identity	Value
Source revision	96303c0e2626a47288e9fc283916770b0cebe852
Measured at	2026-09-21T09:40:08.393374+00:00
Result status	completed
Source document SHA-256	544d20a450a3975d00a562e4d282f67004831f9035e2cd0256bd8a2b5ac7ddd6
Policy	Observational codec comparison; no cross-machine regression budget.
platform	macOS-14.8.9-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 15.0.0 (clang-1500.3.9.4) Target: arm64-apple-darwin23.6.0 Thread model: posix InstalledDir: /Applications/Xcode_15.4.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	2.958	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	5.625	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	9.166	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	23.042	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	21.750	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	50.167	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	35.167	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	77.708	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	50.292	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	99.792	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	65.875	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	115.750	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	85.166	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	1,145.333	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	585.125	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	2,349.792	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	1,252.541	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	9,396.000	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	5,543.083	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	158.750	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	94.958	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	239.958	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	145.500	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	241.875	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	243.333	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	815.583	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	750.250	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	108.958	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	72.875	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	55.750	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.gray-128-q85	libjpeg-turbo	60.958	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.gray-512-q85	image-slash-star	1,184.250	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.gray-512-q85	libjpeg-turbo	1,049.333	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
encode.cmyk-128-q85	image-slash-star	312.208	Not measured	Not measured	5	completed; output hash match: False; byte length match: False	native → native	Not applicable
encode.cmyk-128-q85	libjpeg-turbo	212.042	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	6,799.250	Not measured	Not measured	5	completed; output hash match: False; byte length match: False	native → native	Not applicable
encode.cmyk-512-q85	libjpeg-turbo	3,870.625	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	114.958	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	1.958	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	5.167	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	7.750	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	12.208	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	29.042	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	37.334	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	42.917	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	34.584	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	79.875	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	83.667	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	124.917	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	129.042	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	208.875	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	185.459	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	905.083	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	648.625	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	2,651.292	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	2,335.875	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	11,478.084	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	9,599.875	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	161.042	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	173.167	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	370.334	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	281.292	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	166.417	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	132.791	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	388.750	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	382.584	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	136.833	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	140.125	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	105.667	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.gray-128-q85	libjpeg-turbo	98.000	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	2,165.417	Not measured	Not measured	5	completed; output hash match: True; byte length match: True	native → native	Not applicable
decode.gray-512-q85	libjpeg-turbo	1,707.916	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	580.750	Not measured	Not measured	5	completed; output hash match: False; byte length match: True	native → native	Not applicable
decode.cmyk-128-q85	libjpeg-turbo	441.791	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	10,363.875	Not measured	Not measured	5	completed; output hash match: False; byte length match: True	native → native	Not applicable
decode.cmyk-512-q85	libjpeg-turbo	7,524.833	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	130.708	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	135.958	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.