AltiVec

AltiVec vectorization of hashing algorithms

Hashing a piece of data is one of the most time consuming process in a a database. Basically, the process builds a unique integer (aka 'hash key') from a series of operations on the objects bytes. Usually these algorithms are not parallelizable, or at least not easily parallelizable, due to the dependency to previous calculations involved. Taking a single family of hashing algorithms, we will provide (with mathematical proof) a second deterministic way of calculating the Nth hash, using easily parallelizable tecniques and also provide the Altivec equivalent of this algorithm.

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