version 1.8.2
Changes since 1.8.1:
- Fixes to the CMake build, particularly around the new TBB feature.

version 1.8.1
Changes since 1.8.0:
- [CMake] Fix transitive dependencies for TBB when libblake3 is built
  with BLAKE3_USE_TBB=1 (#460 and #461).

version 1.8.0
Changes since 1.7.0:
- The Rust crate now provides the `blake3::hazmat` module, which
  replaces the undocumented and now deprecated `blake3::guts` module.
  This is intended for advanced use cases like Bao and Iroh, which need
  to manipulate chunk and subtree "chaining values" directly. See the
  module docs for more: https://docs.rs/blake3/1.8.0/blake3/hazmat

version 1.7.0
Changes since 1.6.1:
- The C implementation has gained multithreading support, based on
  Intel's oneTBB library. This works similarly to the Rayon-based
  multithreading used in the Rust implementation. See c/README.md for
  details. Contributed by @silvanshade (#445).
- The Rust implementation has gained a WASM SIMD backend, gated by the
  `wasm32_simd` Cargo feature. Under Wasmtime on my laptop, this is a 6x
  performance improvement for large inputs. This backend is currently
  Rust-only. Contributed by @monoid (#341).
- Fixed cross-compilation builds targeting Windows with cargo-xwin.
  Contributed by @Sporif and @toothbrush7777777 (#230).
- Added `b3sum --tag`, which changes the output format. This is for
  compatibility with GNU checksum tools (which use the same flag) and
  BSD checksum tools (which use the output format this flag turns on).
  Contributed by @leahneukirchen (#453) and @dbohdan (#430).

version 1.6.1
Changes since 1.6.0:
- Remove `mmap` from the default features list. It was added
  accidentally in v1.6.0, last week. This is technically a
  backwards-incompatible change, but I would rather not tag v2.0.0 for a
  build-time bugfix with a simple workaround.

version 1.6.0
Changes since 1.5.5:
- Add Hash::from_slice. (#448)
- Fix a build error on Windows 7 targets. (#447)

version 1.5.5
Changes since 1.5.4:
- `b3sum --check` now supports checkfiles with Windows-style newlines.
  `b3sum` still emits Unix-style newlines, even on Windows, but
  sometimes text editors or version control tools will swap them.
- The "digest" feature (deleted in v1.5.2) has been added back to the
  `blake3` crate. This is for backwards compatibility only, and it's
  insta-deprecated. All callers should prefer the "traits-preview"
  feature.

version 1.5.4
Changes since 1.5.3:
- Initial implementation of SIMD acceleration for the XOF (i.e.
  blake3::Hasher::finalize_xof). This brings long output performance
  into line with long input performance. Currently AVX-512-only and
  Unix-only.
- Add build support for "gnullvm" targets (Clang on Windows).
- The "zeroize" feature no longer depends on proc-macros and syn.

version 1.5.3
Changes since 1.5.2:
- Revert the serialization change. It was intended to be backwards
  compatible, but that didn't hold for non-self-describing serialization
  formats like bincode. See #414.

version 1.5.2
Changes since 1.5.1:
- `build.rs` sets `cc::Build::emit_rerun_if_env_changed(false)` to
  prevent some unnecessary rebuilds, particularly when the `PATH`
  changes on Windows. See #324.
- Serializing a `Hash` produces a bytestring instead of an array in
  formats that support bytestrings (like CBOR). Deserialization is
  backwards-compatible with the array format.
- Cleanup and edge case fixes in the C and CMake builds.