carray-jit

https://github.com/himotoyoshi/carray-jit

Write the loop in Ruby, and it runs at the speed of C -- one to two orders of magnitude faster than interpreted. It is for what a CArray expression cannot say: a cell that reaches its neighbours, a recurrence, a loop written out. What may be in a block is a subset of Ruby, and a C compiler has to be present at run time.