They do not cite [1], a paper on (learned) variable computation in RNN, applied to language modeling, that predates their work by almost 8 years. [1] https://o

They do not cite [1], a paper on (learned) variable computation in RNN, applied to language modeling, that predates their work by almost 8 years. [1] https://openreview.net/pdf?id=S1LVSrcge https://openreview.net/pdf?id=S1LVSrcge Microsoft also had something alike at that time, but for image recognition: a CNN at input and then varable computation at classification.