arXiv Machine Learning

Multi-objective Hyperparameter Optimization with Expert Priors

arXiv AI
Oct 16

RecSoup: Efficient Model Merging Approach for Controllable Multi-Objective Recommendation

RecSoup introduces a lightweight two‑stage method for Controllable Multi‑Objective Recommendation (CMOR) that merges multiple objective‑specific models without retraining. The approach first prunes parameters to reduce cross‑objective interference, then adaptively merges them using a learnable preference‑to‑coefficient mapping, enabling dynamic trade‑off control at inference time. Experiments show RecSoup achieves superior Pareto front quality and 165–228× faster inference than parameter‑generation baselines.

By Zidong Jia, Guofu Xie, Xiao Zhang