[ANNOUNCE] vere-v4.0
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Pyry Kovanen
Nov 12, 2025, 12:49:19 PMNov 12
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vere-v4.0 is a major runtime release with the following highlighted features:
* A completely rewritten allocator that reduces memory usage and decreases snapshot size.
* The mars / urth split, a major refactor of the vere multiprocess architecture.
* Stateful urwasm jets, improving on the stateless urwasm capabilities shipped with 410.
* Restored compatibility with 2015-era Intel based macbooks.
* Compatibility with the upcoming 409-k arvo release.
* Support for the 409 "fastboot" brass pill that reduces ship initial boot time from minutes to seconds.
* Support for the 409 spin hint that exposes a call stack for local performance monitoring.
Note that ships that upgrade to vere-v4.0 will be unable to downgrade runtime versions.
Self-hosted users should upgrade by running <your-ship>/.run next.
* A completely rewritten allocator that reduces memory usage and decreases snapshot size.
* The mars / urth split, a major refactor of the vere multiprocess architecture.
* Stateful urwasm jets, improving on the stateless urwasm capabilities shipped with 410.
* Restored compatibility with 2015-era Intel based macbooks.
* Compatibility with the upcoming 409-k arvo release.
* Support for the 409 "fastboot" brass pill that reduces ship initial boot time from minutes to seconds.
* Support for the 409 spin hint that exposes a call stack for local performance monitoring.
Note that ships that upgrade to vere-v4.0 will be unable to downgrade runtime versions.
Self-hosted users should upgrade by running <your-ship>/.run next.
For full release notes see https://github.com/urbit/vere/releases/tag/vere-v4.0
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