* read operations: before a read operation with the source data likely not in
* the CPU cache, the source data prefetch is issued and the table lookup
* operation is postponed in favor of some other unrelated work, which the CPU
* read operations: before a read operation with the source data likely not in
* the CPU cache, the source data prefetch is issued and the table lookup
* operation is postponed in favor of some other unrelated work, which the CPU