Ceygen

========================

========================

* :func:`~core.eigen_version` function introduced to get Eigen version.
* :mod:`~ceygen.llt` module introduced with Cholesky matrix decomposition.
* :obj:`~dtype.dtype` enhanced to provide C char, short, int, long and float types in
addition to C double type. :obj:`~dtype.nonint_dtype` introduced for non-integer
numeric types. If you get *no suitable method found* or *Invalid use of fused types,
type cannot be specialized* Cython errors, specify the specialization explicitly:
``ceygen.elemwise.add_vv[double](np.array(...), np.array(...))``. This unfortunately
slows down compilation and makes resulting modules bigger, but doesn't affect
performance and makes Ceygen more generic.
* :func:`~elemwise.power_vs` and :func:`~elemwise.power_ms` functions were added to the
:mod:`~ceygen.reductions` module.

========================

* :mod:`~ceygen.reductions` module was added with vector, matrix, row-wise and column-wise
sums.
* Simple benchmarks for many functions have been added, define ``BENCHMARK`` or
``BENCHMARK_NUMPY`` environment variable during test execution to run them; define
``SAVE`` environment variable to save timings into ``.pickle`` files that can be
visualized by ``support/visualize_stats.py``.
* Added code paths optimized for C-contiguous and F-contiguous matrices and vectors using
fancy C++ dispatching code. Rougly 40% speed gains in :func:`core.dot_mm` (for common
matrix sizes), 300% gains for :func:`core.dot_mv` and :func:`core.dot_vm` starting with
16\*16, 30% gains for vector-vector operations and slight gains at other places.
* Internal Ceygen .pxd files (e.g. ``eigen_cython.pxd``) are no longer installed.
* ``-fopenmp`` is now added by default to `build_ext` ``cflags`` and ``ldflags`` to
enable parellelising :func:`core.dot_mm` in Eigen; speedups are noticeable for matrices
64\*64 and bigger. Can be easily disabled.
* :func:`dtype.vector` and :func:`dtype.matrix` convenience functions added; their usage
in other modules leads to speedups because it circumvents Cython shortcoming.
* :func:`core.set_is_malloc_allowed` added to aid in debugging and tests.