Accounting for Variance in Machine Learning Benchmarks
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Abstract (arXiv)
Strong empirical evidence that one machine-learning algorithm A outperforms another one B ideally calls for multiple trials optimizing the learning pipeline over sources of variation such as data sampling, data augmentation, parameter initialization, and hyperparameters choices. This is prohibitively expensive, and corners are cut to reach conclusions. We model the whole benchmarking process, revealing that variance due to data sampling, parameter initialization and hyperparameter choice impact markedly the results. We analyze the predominant comparison methods used today in the light of this variance. We show a counter-intuitive result that adding more sources of variation to an imperfect estimator approaches better the ideal estimator at a 51 times reduction in compute cost. Building on these results, we study the error rate of detecting improvements, on five different deep-learning tasks/architectures. This study leads us to propose recommendations for performance comparisons.
Key facts. Cited by 195 papers in the map (data through 7 Oct 2026). Builds on 24 of its 76 references that are in the map. First posted on arXiv 1 Mar 2021.
Builds on
24 of 76 references.
References · 24
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- 2020Research Reproducibility as a Survival Analysiscited by 14
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Citing papers per year: 2021: 18; 2022: 20; 2023: 25; 2024: 26; 2025: 20; 2026: 86.
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