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Accelerating SGD with momentum for over-parameterized learning

ICLR 2020 · Optimization › Optimizers · approach: SGD momentum and step-size schedules · 46 citations (OpenAlex)

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Measured effects reported in the paper

What was changedWhereMeasuredEffect
Use MaSS instead of the strongest listed baseline at η=0.01CNN · CIFAR-10 testclassification accuracy: 83.06% -> 83.97%Helped
Use MaSS instead of the strongest listed baseline at η=0.3CNN · CIFAR-10 testclassification accuracy: 82.41% -> 84.48%Helped
Use MaSS instead of the strongest listed baseline at η=0.1ResNet-32 · CIFAR-10 testclassification accuracy: 92.60% -> 92.77%Helped
Use MaSS instead of the strongest listed baseline at η=0.3ResNet-32 · CIFAR-10 testclassification accuracy: 92.51% -> 92.71%Helped
Increase initial learning rate from 0.01 to 0.3SGD+Nesterov on CNN · CIFAR-10 testclassification accuracy: 83.06% -> 75.79%Hurt
Increase initial learning rate from 0.1 to 0.3SGD+Nesterov on ResNet-32 · CIFAR-10 testclassification accuracy: 92.60% -> 91.13%Hurt
Use the SGD-optimal step size with Nesterov momentumSGD+Nesterov · Interpolated linear regressionconvergenceHurt
Add a gradient compensation term to Nesterov SGDMaSS · Interpolated quadratic lossconvergence rate: O(e^{-t/κ_m}) -> O(e^{-t/√(κ_m\tilde{κ}_m)})Helped
Increase mini-batch size in the linear-scaling regimeMaSS · Interpolated quadratic loss, m < m*_1convergence speed: O(e^{-m·t/√(κ₁\tilde{κ})})Helped
Increase mini-batch size in the diminishing-returns regimeMaSS · Interpolated quadratic loss, m∈[m*_1,m*_2)convergence speedHelped
Increase mini-batch size beyond m*_2MaSS · Interpolated quadratic loss, m≥m*_2convergence speedNo clear effect

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