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Ran 28 Aug 2025 07:08PM UTC

Files 983

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Committed 28 Aug 2025 06:57PM UTC coverage: 72.958% (+0.04%) from 72.92%

Job # 17305259223.1

Build Type

push

github

Committed by

web-flow

Commit Message

Reduce the size of `Zone` by deferring lookups (#6903)

Alternative to #6902

This defers the lookups in `zones`, `names`, `rules`, and `regions` from
the constructor, only storing the index in the `Zone` struct.

This will cost an additional lookup at the beginning of each zone
operation, but these are fairly lookup-heavy already anyway. It also
saves the lookups for name and region, which are probably only needed
very rarely. In exchange, the size of `Zone` gets significantly
decreased.

Also adds a `RawZone` abstraction which can be GIGO converted to and
from `Zone`, with the invariant being that the same `ZoneInfo64`
instance is used throughout. Users like temporal can combine this with a
static `LazyLock<ZoneInfo64>` to provide a safe wrapper with minimal
size.

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