DeepLight: Deep Lightweight Feature Interactions for Accelerating CTR Predictions in Ad Serving

• URL: http://arxiv.org/abs/2002.06987v3
• Date: Wed, 6 Jan 2021 22:13:51 GMT
• Title: DeepLight: Deep Lightweight Feature Interactions for Accelerating CTR Predictions in Ad Serving
• Authors: Wei Deng and Junwei Pan and Tian Zhou and Deguang Kong and Aaron Flores and Guang Lin
• Abstract summary: Click-through rate (CTR) prediction is a crucial task in online display advertising. embedding-based neural networks have been proposed to learn both explicit feature interactions. These sophisticated models, however, slow down the prediction inference by at least hundreds of times.
• Score: 15.637357991632241
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Click-through rate (CTR) prediction is a crucial task in online display advertising. The embedding-based neural networks have been proposed to learn both explicit feature interactions through a shallow component and deep feature interactions using a deep neural network (DNN) component. These sophisticated models, however, slow down the prediction inference by at least hundreds of times. To address the issue of significantly increased serving delay and high memory usage for ad serving in production, this paper presents \emph{DeepLight}: a framework to accelerate the CTR predictions in three aspects: 1) accelerate the model inference via explicitly searching informative feature interactions in the shallow component; 2) prune redundant layers and parameters at intra-layer and inter-layer level in the DNN component; 3) promote the sparsity of the embedding layer to preserve the most discriminant signals. By combining the above efforts, the proposed approach accelerates the model inference by 46X on Criteo dataset and 27X on Avazu dataset without any loss on the prediction accuracy. This paves the way for successfully deploying complicated embedding-based neural networks in production for ad serving.

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