DS-Frame: slow-fast adaptive inference routes recommender compute by user difficulty

_reachsumit · x · 2026-09-03

DS-Frame is an adaptive fast-slow inference framework for sequential recommendation: a lightweight Fast System handles routine predictions, a Slow System performs iterative latent refinement, and a learned selector routes each sample under a controllable compute budget. Motivated by static recommenders degrading on hard user groups (long histories, niche profiles), it consistently improves multiple backbones across five real-world datasets, with larger gains on challenging groups. Code is open-sourced.

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