ctrl+f "FUNDAMENTAL PROBLEM" to find his writeup of the actual difficulties of fast VAX implementations, including ways that x86 is easier than VAX. The big wha

ctrl+f "FUNDAMENTAL PROBLEM" to find his writeup of the actual difficulties of fast VAX implementations, including ways that x86 is easier than VAX. The big whammy is string ops where the length operand can be indirectly-addressed. x86 string ops, which are a lot simpler, were slow until pretty recently.