  The GooFit package provides physicists a simple, familiar syntax for
manipulating probability density functions and performing fits, and is highly
optimized for data analysis on NVIDIA GPUs and multithreaded CPU backends.
GooFit was updated to version 2.0, bringing a host of new features. A
completely revamped and redesigned build system makes GooFit easier to install,
develop with, and run on virtually any system. Unit testing, continuous
integration, and advanced logging options are improving the stability and
reliability of the system. Developing new PDFs now uses standard CUDA
terminology and provides a lower barrier for new users. The system now has
built-in support for multiple graphics cards or nodes using MPI, and is being
tested on a wide range of different systems. GooFit also has significant
improvements in performance on some GPU architectures due to optimized memory
access. Support for time-dependent four-body amplitude analyses has also been
added.
