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Moonwalk: Inverse-Forward Differentiation
Feb. 23, 2024, 5:42 a.m. | Dmitrii Krylov, Armin Karamzade, Roy Fox
cs.LG updates on arXiv.org arxiv.org
Abstract: Backpropagation, while effective for gradient computation, falls short in addressing memory consumption, limiting scalability. This work explores forward-mode gradient computation as an alternative in invertible networks, showing its potential to reduce the memory footprint without substantial drawbacks. We introduce a novel technique based on a vector-inverse-Jacobian product that accelerates the computation of forward gradients while retaining the advantages of memory reduction and preserving the fidelity of true gradients. Our method, Moonwalk, has a time complexity …
abstract arxiv backpropagation computation consumption cs.ai cs.lg differentiation gradient memory memory consumption networks novel product reduce scalability type vector work
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