Sourced from bumpalo's changelog.

3.19.0

Released 2025-06-24.

Added

• Added bumpalo::collections::Vec::retain_mut, similar to std::vec::Vec::retain_mut.

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3.18.1

Released 2025-06-05.

Removed

• Removed the allocator-api2 version bump from 3.18.0, as it was not actually semver compatible.

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3.18.0 (yanked)

Released 2025-06-05.

Added

• Added support for enforcing a minimum alignment on all allocations inside a Bump arena, which can provide speed ups when allocating objects whose alignment is less than or equal to that minimum.
• Added serde serialization support for bumpalo::collections::String.
• Added some missing fallible slice allocation function variants.

Changed

• Replaced extend_from_slice implementation with a formally-verified version that is also faster and more-optimizable for LLVM.
• Updated allocator-api2 support to version 0.3.*.

Fixed

• Fixed a bug where the allocated_bytes metrics helper was accidentally including the size of bumpalo's footer, rather than just reporting the user-allocated bytes.

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