RFC 0015: Monotonic Time::Instant#15
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straight-shoota merged 28 commits intomainfrom Jan 12, 2026
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This pull request has been mentioned on Crystal Forum. There might be relevant details there: https://forum.crystal-lang.org/t/ambiguous-use-of-time-span-for-duration-and-monotonic-clock/8324/13 |
ysbaddaden
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ysbaddaden
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straight-shoota
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Sija
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straight-shoota
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Time::MonotonicTime::Instant
ysbaddaden
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Looks good 👍
Let's see how an implementation would fare, now!
straight-shoota
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Implements [RFC 15](crystal-lang/rfcs#15)
ysbaddaden
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Dec 16, 2025
Co-authored-by: Julien Portalier <julien@portalier.com>
straight-shoota
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Dec 16, 2025
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My review is still the same: the RFC looks good, but we must see see and review how the integration fares before approval.
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) Implements clock adjustments as proposed in [RFC 0015](crystal-lang/rfcs#15). We're using `CLOCK_MONOTONIC` everywhere except Linux (where it doesn't tick while suspended) and darwin (where resolution is only 1 microsecond). This is a breaking change on both Linux and darwin where we previously used clocks that don't count suspended or sleeping time.
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This pull request has been mentioned on Crystal Forum. There might be relevant details there: https://forum.crystal-lang.org/t/ambiguous-use-of-time-span-for-duration-and-monotonic-clock/8324/17 |
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I believe it's done (minus one cleanup) 👍
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## Context `Time.monotonic` has been [deprecated](crystal-lang/rfcs#15) in Crystal stdlib. The new `Time.instant` API doesn't, for good reason, doesn't have any overlap with `Time`, thus making it somewhat incompatible with `ACLK::Interface`. Instead of trying to hack in some solution using `Time.instant`, this PR just removes the monotonic clock. If/when there is a usecase that comes up that would benefit from it. We could explore our options at that point. ## Changelog - Remove `ACLK::Monotonic` - Update `console` usages to use `ACLK::Native`
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Jan 10, 2026
## Context `Time.monotonic` has been [deprecated](crystal-lang/rfcs#15) in Crystal stdlib. The new `Time.instant` API doesn't, for good reason, doesn't have any overlap with `Time`, thus making it somewhat incompatible with `ACLK::Interface`. Instead of trying to hack in some solution using `Time.instant`, this PR just removes the monotonic clock. If/when there is a usecase that comes up that would benefit from it. We could explore our options at that point. ## Changelog - Remove `ACLK::Monotonic` - Update `console` usages to use `ACLK::Native`
PallasAthenaie
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Jan 10, 2026
## Context `Time.monotonic` has been [deprecated](crystal-lang/rfcs#15) in Crystal stdlib. The new `Time.instant` API doesn't, for good reason, doesn't have any overlap with `Time`, thus making it somewhat incompatible with `ACLK::Interface`. Instead of trying to hack in some solution using `Time.instant`, this PR just removes the monotonic clock. If/when there is a usecase that comes up that would benefit from it. We could explore our options at that point. ## Changelog - Remove `ACLK::Monotonic` - Update `console` usages to use `ACLK::Native`
ysbaddaden
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Co-authored-by: Julien Portalier <julien@portalier.com>
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Preview: https://github.com/crystal-lang/rfcs/blob/rfc/time-monotonic/text/0015-time-monotonic.md