Benchmark results¶

Recorded 2026-09-21. Historical measurement. Not a measurement of the latest release. Run status: completed.

Which implementation takes less time? Compare every workload with Pillow, the baseline. Lower time is better.

pillow-rs · CPU1 faster · 3 slowervs Pillow · 0 equal · 0 not comparable

pillow-rs · SIMD2 faster · 2 slowervs Pillow · 0 equal · 0 not comparable

pillow-rs · GPU0 faster · 4 slowervs Pillow · 0 equal · 0 not comparable

Observed median comparisons, not an overall score. Timing-only rows do not establish equal output; small differences may be noise.

Shorter bars = less time within a row. Click a column heading to sort. Scroll the table horizontally on small screens.

Baseline Median · vs baseline Median · vs baseline Median · vs baseline Lowest medianAmong comparable implementations

PipelinesTranspose twice1024 × 1024 · RGB · 2 operations · whole workflow 4.18 msBaselinePillow. Output comparison passed. 6.39 ms1.53× slowerpillow-rs · CPU. Output comparison passed. 4.38 ms1.05× slowerpillow-rs · SIMD. Output comparison passed. 13.5 ms3.23× slowerpillow-rs · GPU. Output comparison passed. PillowOutput comparison passed

Transpose twice · Timing boundary: whole_workflow. Sample unit: timed workflow execution. Percentiles show spread, not confidence intervals.

Implementation	Median	P90	P95	Samples	Recorded result
Pillow	4.18 ms	Not measured	7.07 ms	100	completed; source_target_match: pass
pillow-rs · CPU	6.39 ms	Not measured	11.3 ms	100	completed; source_target_match: pass
pillow-rs · SIMD	4.38 ms	Not measured	50.7 ms	100	completed; source_target_match: pass
pillow-rs · GPU	13.5 ms	Not measured	18 ms	100	completed; source_target_match: pass

Workload ID: pipeline.quick.transpose-twice.rgb-1024

PipelinesGaussianblur invert1024 × 1024 · RGB · 2 operations · whole workflow 13.9 msBaselinePillow. Output comparison passed. 30.3 ms2.18× slowerpillow-rs · CPU. Output comparison passed. 26.2 ms1.88× slowerpillow-rs · SIMD. Output comparison passed. 21.7 ms1.56× slowerpillow-rs · GPU. Output comparison passed. PillowOutput comparison passed

Gaussianblur invert · Timing boundary: whole_workflow. Sample unit: timed workflow execution. Percentiles show spread, not confidence intervals.

Implementation	Median	P90	P95	Samples	Recorded result
Pillow	13.9 ms	Not measured	24.5 ms	100	completed; source_target_match: pass
pillow-rs · CPU	30.3 ms	Not measured	41.8 ms	100	completed; source_target_match: pass
pillow-rs · SIMD	26.2 ms	Not measured	71.2 ms	100	completed; source_target_match: pass
pillow-rs · GPU	21.7 ms	Not measured	27.5 ms	100	completed; source_target_match: pass

Workload ID: pipeline.quick.gaussianblur-invert.rgb-1024

PipelinesMultiply screen1024 × 1024 · RGB · 2 operations · whole workflow 9.93 msBaselinePillow. Output comparison passed. 3.95 ms2.51× fasterpillow-rs · CPU. Output comparison passed. 6.72 ms1.48× fasterpillow-rs · SIMD. Output comparison passed. 35.9 ms3.61× slowerpillow-rs · GPU. Output comparison passed. pillow-rs · CPUOutput comparison passed

Multiply screen · Timing boundary: whole_workflow. Sample unit: timed workflow execution. Percentiles show spread, not confidence intervals.

Implementation	Median	P90	P95	Samples	Recorded result
Pillow	9.93 ms	Not measured	16.9 ms	100	completed; source_target_match: pass
pillow-rs · CPU	3.95 ms	Not measured	43.3 ms	100	completed; source_target_match: pass
pillow-rs · SIMD	6.72 ms	Not measured	9.55 ms	100	completed; source_target_match: pass
pillow-rs · GPU	35.9 ms	Not measured	44.1 ms	100	completed; source_target_match: pass

Workload ID: pipeline.quick.multiply-screen.rgb-1024

PipelinesInvert mirror1024 × 1024 · RGB · 2 operations · whole workflow 4.31 msBaselinePillow. Output comparison passed. 4.94 ms1.15× slowerpillow-rs · CPU. Output comparison passed. 3.12 ms1.38× fasterpillow-rs · SIMD. Output comparison passed. 13.6 ms3.17× slowerpillow-rs · GPU. Output comparison passed. pillow-rs · SIMDOutput comparison passed

Invert mirror · Timing boundary: whole_workflow. Sample unit: timed workflow execution. Percentiles show spread, not confidence intervals.

Implementation	Median	P90	P95	Samples	Recorded result
Pillow	4.31 ms	Not measured	6.85 ms	100	completed; source_target_match: pass
pillow-rs · CPU	4.94 ms	Not measured	13.9 ms	100	completed; source_target_match: pass
pillow-rs · SIMD	3.12 ms	Not measured	50.6 ms	100	completed; source_target_match: pass
pillow-rs · GPU	13.6 ms	Not measured	18.5 ms	100	completed; source_target_match: pass

Workload ID: pipeline.quick.invert-mirror.rgb-1024

4 recorded workloads · 2026-09-21 · macOS-14.8.9-arm64-arm-64bit

Python API operations and complete pipelines, including their declared setup and output steps. CPU, SIMD and GPU are separate implementations.

Measurement details and hardware · Download results · Contributor benchmark guide