[Dylan16807]

But they fixed the old case, by having a minimum number of heavy instructions before changing clocks. If you have some instructions there just for the occasional memcpy, it will be a little slow during the memcpy but it won't downclock and the overall impact will be very small.

Now that the older and bigger case is fixed, this case remains the last sticking point. Because you still can't trust the CPU to do the right thing when there are a small number of heavy instructions. Even if they cut the halting time to 0, it's still bad for a single instruction to cause a prolonged downclock.