> Instructions in the CPU happen one after another https://en.wikipedia.org/wiki/Superscalar_processor https://en.wikipedia.org/wiki/Superscalar_processor > a

> Instructions in the CPU happen one after another https://en.wikipedia.org/wiki/Superscalar_processor https://en.wikipedia.org/wiki/Superscalar_processor > a CPU will never execute later instructions before earlier instructions https://en.wikipedia.org/wiki/Out-of-order_execution https://en.wikipedia.org/wiki/Out-of-order_execution > The CPU would never run some code and then decide it wants to go back and have another go https://en.wikipedia.org/wiki/Speculative_execution https://en.wikipedia.org/wiki/Speculative_execution