Try Our Apps


Petrichor: The smell after rainfall

strength reduction

strength reduction in Technology

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 function. E.g.
f x = ... (2**x) ... (f (x+1)) ...
f x = f' x (2**x) where 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Here the expensive operation (2**x) has been replaced by the cheaper 2*z in the recursive function f'.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'.

The Free On-line Dictionary of Computing, © Denis Howe 2010
Cite This Source

Word of the Day

Word Value for strength

Scrabble Words With Friends

Nearby words for strength reduction