Enhanced PDHG for Linear Programming with Online Preconditioning
Optimization and Control
2025-06-24 v1
Abstract
We present an online preconditioning technique for the primal-dual hybrid gradient (PDHG) algorithm for linear programming (LP). The method adaptively updates primal and dual preconditioners using an online optimization framework. To improve its practical performance, we introduce several algorithmic enhancements, including using normalized online loss functions and updating preconditioners infrequently. We implement the technique on top of vanilla PDHG and the GPU-based LP solver cuPDLP.jl, and benchmark its performance on standard LP datasets. Our numerical experiments demonstrate that online preconditioning effectively reduces both iteration counts and overall solving time.
Keywords
Cite
@article{arxiv.2506.17650,
title = {Enhanced PDHG for Linear Programming with Online Preconditioning},
author = {Haihao Lu and Wanyu Zhang},
journal= {arXiv preprint arXiv:2506.17650},
year = {2025}
}