Linked by Eugenia Loli on Mon 6th Dec 2004 10:28 UTC
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"I speak about altivec because Eugenia doesn't.
I know that most softwares aren't optimized for Altivec, but I think that with Tiger and gcc 3.5 that optimize the code for altivec, the G4 will be more efficient."
Altivec is just a vector processing engine. It only has some very narrow uses. It won't speedup every program and it certainly is not easy/possible for any compiler to automatically extract all the paralellism out of source code. Besides that, Intel has SSE which is comparable to Altivec.