In plain words: An older text model with built-in memory gets one simple attention step, letting it cheaply look back over earlier text. Trained on a single desktop GPU in a day, it nearly matches the best systems that predict text one character at a time.
Abstract · Single Headed Attention RNN: Stop Thinking With Your Head
The leading approaches in language modeling are all obsessed with TV shows of my youth - namely Transformers and Sesame Street. Transformers this, Transformers that, and over here a bonfire worth of GPU-TPU-neuromorphic wafer scale silicon. We opt for the lazy path of old and proven techniques with a fancy crypto inspired acronym: the Single Headed Attention RNN (SHA-RNN). The author's lone goal is to show that the entire field might have evolved a different direction if we had instead been obsessed with a slightly different acronym and slightly different result. We take a previously strong language model based only on boring LSTMs and get it to within a stone's throw of a stone's throw of state-of-the-art byte level language model results on enwik8. This work has undergone no intensive hyperparameter optimization and lived entirely on a commodity desktop machine that made the author's small studio apartment far too warm in the midst of a San Franciscan summer. The final results are achievable in plus or minus 24 hours on a single GPU as the author is impatient. The attention mechanism is also readily extended to large contexts with minimal computation. Take that Sesame Street.
Stephen Merity
arXiv:1911.11423 · cs.CL, cs.AI, cs.NE · submitted Nov 26, 2019 · updated Nov 27, 2019
abstract · pdf · html · Addition of citations and contextual results (no attention head, single attention head, attention per layer), removal of wordpiece WikiText-103 numbers due to normalization issues, fix of SHA attention figure Q arrow, other minor fixes