TurboGR: An Accelerated Training System for Large-Scale Generative Recommendation. - Huichao Chai; Zhixin Wu; Xuemiao Li; Shiqing Fan; Hengfeng Wang; Maojun Peng; Lu Xu; Yaoyuan Wang; Yibo Jin 005; Wei Guo; Yongxiang Feng (CoRR, 2026)