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humanAge

humanAge(ms): string

How old a cached answer is. undefined is a miss, which has no age at all — and says so rather than reading as “0s old”, which would claim a freshness nothing measured.

The floor of one second is deliberate: an answer read out of the store moments after it was written is still an answer from the store, and “0s old” invites the reader to think it is live.

ParameterType
msnumber | undefined

string