finite differencing ==>
An optimisation where a function of some systematically changing variable is
calculated more efficiently by using previous values of the function. In a
procedural language this would apply to an expression involving a loop variable
and in a declarative language it would apply to the argument of a recursive
f x = ... (2**x) ... (f (x+1)) ...
f x = f' x (2**x)
f ' x z = ... z ... (f' (x+1) 2*z) ...
Here the expensive operation (2**x) has been replaced by the cheaper 2*z
in the recursive function f'. This maintains the
invariant that z = 2**x for any call to f'.
Streaming SIMD Extensions « stream-oriented «
strength reduction » STRESS » stress testing »