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Movement Pruning: Adaptive Sparsity by Fine-Tuning

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arxiv 2005.07683 v2 pith:BKJDLOJG submitted 2020-05-15 cs.CL cs.LG

classification cs.CLcs.LG
keywords pruningmodelmovementadaptivefine-tuningfirst-orderlanguagelearning
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Magnitude pruning is a widely used strategy for reducing model size in pure supervised learning; however, it is less effective in the transfer learning regime that has become standard for state-of-the-art natural language processing applications. We propose the use of movement pruning, a simple, deterministic first-order weight pruning method that is more adaptive to pretrained model fine-tuning. We give mathematical foundations to the method and compare it to existing zeroth- and first-order pruning methods. Experiments show that when pruning large pretrained language models, movement pruning shows significant improvements in high-sparsity regimes. When combined with distillation, the approach achieves minimal accuracy loss with down to only 3% of the model parameters.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Investigating Structural Pruning and Recovery Techniques for Compressing Multimodal Large Language Models: An Empirical Study

    cs.CL 2025-07 conditional novelty 5.0 of 10

    Structural pruning with finetuning plus hidden-state distillation recovers most performance in multimodal LLMs, with 5% of training data sufficient at moderate compression levels.

  2. The Carbon Cost of Conversation, Sustainability in the Age of Language Models

    cs.CY 2025-07 reject novelty 2.0 of 10

    A review-style essay that claims LLM training and use are environmentally expensive, but the quantitative evidence it presents is unreliable and internally inconsistent.

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