<human>:  Why is the ADD instruction so slow?
<bot>: It’s because it’s a load instruction. It’s a very expensive instruction. In the old days, when computers were slower, they used to have to wait for the processor to finish a load instruction before they could continue executing instructions. This is because it’s very slow to fetch and decode instructions from memory. But now that we have fast processors, we can execute instructions faster, so we don’t have to wait for the processor to fetch instructions from memory.