Also,

[davv]

In the sweep of a second, all the people who live on this world experience what would sum up to two centuries of life for a single person.

In a single second.

(Sleep is not a problem, as the same share of those two centuries would be given sleep were it divided up to seven billion or condensed to one person.)

Comments

[lhexa]

Crust to surface, I'm thinking, using some decent synchronization system. And I'm talking about relativity-of-simultaneity effects, not time-dilation or length-contraction effects. If the scale is large enough -- Earth sized, for instance -- the intervals between disparate parallel-processing events will be spacelike, whereas normal computing schemes assume that all intervals are timelike.