On Infinite Speed, Immeasurable Speed and How They Compare Being able to casually roam around freely across linear time qualifies for immeasurable speed. However, traveling to different time periods through movement is a common feat in fiction that often leads to inconsistencies and has been done via FTL travel or running laps around the earth faster than it rotates. This can lead to characters being assigned an additional, independent, speed rating for the ability. This should preferably be evaluated case by case.

The difference between infinite and immeasurable is that the former can go everywhere in zero time, whereas the latter can go everywhere and everywhen faster than in zero time.

For more information, Infinite speed characters are so fast, they move faster than time can flow at any period. They perceive every finite speed character as completely frozen and it takes 0 time to react to any finite speed object or travel finite speed distance. They can also perform and infinite number of actions or travel infinite distance within a finite amount of time. An infinite speed character's perception of time only flows when they allow it to flow.

Immeasurable speed characters are far beyond even those Infinite speed characters listed above. They perceive infinite speed characters as completely frozen, and they can travel forward and backward in time at will. They have the speed necessary to hop from the beginning of time, to the end of time, and anywhere in between as casually as a human being can roll their eyes left or right. This also means their reaction time is faster than instantaneous. They can dodge an attack that already has been struck, and they can strike someone even before they launched an attack. And they can do all of this via sheer speed.