Tinyarrays are similar to NumPy arrays, but optimized for small sizes.
Common operations on very small arrays are to 3-7 times faster than with
NumPy, and 3 times less memory is used to store them.  Tinyarrays are
useful if you need many small arrays of numbers, and cannot combine them
into a few large ones. (The resulting code is still much slower than C,
but it may now be fast enough.)
