Before revision:  In this work, a modular GPU-accelerated alignment library called Cryo-RALib is proposed. The library contains both reference-free alignment and multireference alignment that can be widely used to accelerate state-of-the-art classification algorithms.
After revision:  In this work, a modular GPU-accelerated alignment library called Cryo-RALib that contains GPU-accelerated modular routines for accelerating MRA-based classification algorithms.