SSDs are electronic, while HDDs are mechanical. This means that moving memory regions (pages) between system RAM and the storage requires:
physical moves, in the case of HDD
accessing a different region of the chips, in the case of SSD
Imagine a scenario in which completely unrelated data access requests floods your storage drive. An HDD needs to constantly realign its needle to the requested locations, while the SSD can just re-route its data lines to that location.
Is SSD really more efficient for swap?
SSDs are way more efficient than HDDs for swap.
SSDs are electronic, while HDDs are mechanical. This means that moving memory regions (pages) between system RAM and the storage requires:
Imagine a scenario in which completely unrelated data access requests floods your storage drive. An HDD needs to constantly realign its needle to the requested locations, while the SSD can just re-route its data lines to that location.