Editing Out-of-order execution (section)

=== Background ===
Out-of-order execution is more sophisticated relative to the baseline of in-order execution. In pipelined in-order execution processors, execution of instructions overlap in pipelined fashion with each requiring multiple [[clock cycle]]s to complete. The consequence is that results from a previous instruction will lag behind where they may be needed in the next. In-order execution still has to keep track of these dependencies. Its approach is however quite unsophisticated: stall, every time. Out-of-order uses much more sophisticated data tracking techniques, as described below.