view doc/README @ 47348:a4de570e61fa

dirstate-v2: Allow tree nodes without an entry to store a timestamp

Timestamps are stored on 96 bits:

* 64 bits for the signed number of seconds since the Unix epoch
* 32 bits for the nanoseconds in the `0 <= ns < 1_000_000_000` range

For now timestamps are not used or set yet.

Differential Revision: https://phab.mercurial-scm.org/D10825

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