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by sylvain_kerkour 1997 days ago
Not exactly, They can be sorted, by default, only down to a millisecond, but you can use a monotonic generator to have them sorted, even if more than one Ulid is generated within a millisecond.

Other than that, they have 80 bits of randomness, enough to be unique even if millions are generated per second.

https://github.com/ulid/spec