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Lessons on Parameter Sharing across Layers in Transformers

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arxiv 2104.06022 v4 pith:SMGHUSWE submitted 2021-04-13 cs.CL cs.LG

classification cs.CLcs.LG
keywords parameterproposedstrategiestransformerscomputationalcyclelayerlayers
verification ladder T0 review T1 audit T2 compute T3 formal
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We propose a parameter sharing method for Transformers (Vaswani et al., 2017). The proposed approach relaxes a widely used technique, which shares parameters for one layer with all layers such as Universal Transformers (Dehghani et al., 2019), to increase the efficiency in the computational time. We propose three strategies: Sequence, Cycle, and Cycle (rev) to assign parameters to each layer. Experimental results show that the proposed strategies are efficient in the parameter size and computational time. Moreover, we indicate that the proposed strategies are also effective in the configuration where we use many training data such as the recent WMT competition.

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Cited by 2 Pith papers

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