LANA: Latency Aware Network Acceleration

We introduce latency-aware network acceleration (LANA) – an approach that builds on neural architecture search techniques and teacher-student distillation to accelerate neural networks. LANA consists of two phases: in the first phase, it trains many alternative operations for every layer of the teacher network using layer-wise feature map distillation. In the second phase, it solves the combinatorial selection of efficient operations using a novel constrained integer linear optimization (ILP) approach. ILP brings unique properties as it (i) performs NAS within a few seconds to minutes, (ii) easily satisfies budget constraints, (iii) works on the layergranularity, (iv) supports a huge search spaceOp10q, surpassing prior search approaches in efficacy and efficiency. In extensive experiments, we show that LANA yields efficient and accurate models constrained by a target latency budget, while being significantly faster than other techniques. We analyze three popular network architectures: EfficientNetV1, EfficientNetV2 and ResNeST, and achieve up to 3.0% accuracy improvement for all models when compressing larger models to the latency level of smaller models. LANA achieves significant speed-ups (up to 5ˆ) with minor to no accuracy drop on GPU and CPU. The code will be available soon.