  Hydra is a header-only, templated and C++11-compliant framework designed to
perform the typical bottleneck calculations found in common HEP data analyses
on massively parallel platforms. The framework is implemented on top of the
C++11 Standard Library and a variadic version of the Thrust library and is
designed to run on Linux systems, using OpenMP, CUDA and TBB enabled devices.
This contribution summarizes the main features of Hydra. A basic description of
the overall design, functionality and user interface is provided, along with
some code examples and measurements of performance.
