[prs] Benchmark Langevin Dynamics PRS-CS against PRS-CS and SBayes-RC

[akotlar]

Background:

A concise description of why we're pursuing this task.

Austin will create a new PRS-CS module with Langevin dynamics for improved runtimes. We should benchmark this against regular PRS-CS, ..., and Cristina' original PRS.

Completion Criteria:

What is the goal, and how do we know this task is accomplished?

A reproducible writeup is made, and added to the python/bystro/prs folder, linked to the ticket.

Implementation Summary

Give enough technical detail for a teammate to understand the proposed solution.

SBayesRC: https://github.com/zhilizheng/SBayesRC