Add numba, pardiso

Author: TLCFEM

docs/installation.rst

@@ -26,6 +26,20 @@ package index:
 
     pip install sectionproperties
 
+
+Installing ``PARDISO`` Solver
+-----------------------------
+
+The default sparse solver used in ``scipy`` is ``SuperLU``.
+It performs okay for small matrices but appears to be very slow for larger matrices.
+The ``PARDISO`` solver is a much faster alternative, but it requires the installation of the ``MKL`` library, which takes a lot of disk space.
+
+If you do not have a disk space constraint, you can use the ``PARDISO`` solver by:
+
+.. code-block:: shell
+
+    pip install sectionproperties[pardiso]
+
 Installing CAD Modules
 ----------------------