Many Optimizers But Only One Training Path: Repeated Resampling for Adaptive Optimizer Selection
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Computer Science > Machine Learning
Title:Many Optimizers But Only One Training Path: Repeated Resampling for Adaptive Optimizer Selection
Abstract:An optimizer is usually chosen before training a deep neural network and then kept fixed. Treating optimizer choice as a hyperparameter could boost performance, but it requires several complete training runs and discards all but the winner. Repeated Optimizer Resampling (ROR) instead searches during one evolving run. Every $b$ epochs, each candidate optimizer scouts from the current model weights for $s$ epochs. The best scout continues for the remaining $b-s$ epochs, and that completed segment becomes the new incumbent if it improves the validation objective. This design allows the preferred optimizer to change as training progresses.
We compare two variants of ROR on MNIST, Fashion-MNIST, and two motor insurance claim-count models. Nine fixed optimizers and both ROR variants are evaluated with the same ten seeds. One-epoch ROR uses 24\% to 35\% of the aggregate training needed to identify the best fixed optimizer exhaustively and remains close to that optimizer on all four tasks. These results support short scouting as a practical way to search over optimizers without completing every candidate run.
| Subjects: | Machine Learning (cs.LG) |
| Cite as: | arXiv:2608.18810 [cs.LG] |
| (or arXiv:2608.18810v1 [cs.LG] for this version) | |
| https://doi.org/10.48550/arXiv.2608.18810
arXiv-issued DOI via DataCite (pending registration)
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