At the time the SIMD instruction set did not exist and the MMX instruction set was difficult to apply in a way that got us an advantage in our application. Whe

At the time the SIMD instruction set did not exist and the MMX instruction set was difficult to apply in a way that got us an advantage in our application. When you say all modern processors have Hyperthreading, are you sure you don't mean multithreading? I am not sure every processor has hyperthreading. I am not knowledgeable enough to argue about the overall value of MMX and Hyperthreading but I think the point of the article at the top of this page is that it in the end -- although maybe not at first -- it was counter-productive.