The biggest change here is that assembly implementations are enabled by
default.
Added features:
- "pure" (Pure Rust, with no C or assembly implementations.)
Removed features:
- "c" (Now basically the default.)
Renamed features;
- "c_prefer_intrinsics" -> "prefer_intrinsics"
- "c_neon" -> "neon"
Unchanged:
- "rayon"
- "std" (Still the only feature on by default.)
Changes since version 0.2.2:
- Bug fix: Commit 13556be fixes a crash on Windows when using the SSE4.1
assembly implementation (--features=c, set by default for b3sum). This
is undefined behavior and therefore a potential security issue.
- b3sum now supports the --num-threads flag.
- The C API now includes a blake3_hasher_finalize_seek() function, which
returns output from any position in the extended output stream.
- Build fix: Commit 5fad419 fixes a compiler error in the AVX-512 C
intrinsics implementation targeting the Windows GNU ABI.
As part of this change, make the rayon and memmap dependencies
mandatory. This simplifies the code a lot, and I'm not aware of any
callers who build b3sum without the default dependencies.
If --num-threads is not given, or if its value is 0, b3sum will still
respect the RAYON_NUM_THREADS environment variable.
Changes since 0.2.1 (and since c-0.2.0):
- Fix a performance issue when the caller makes multiple calls to
update() with uneven lengths. (#69, reported by @willbryant.)
Changes since 0.1.5:
- The `c_avx512` feature has been replaced by the `c` feature. In
addition to providing AVX-512 support, `c` also provides optimized
assembly implementations. These assembly implementations perform
better, perform more consistently across compilers, and compile more
quickly. As before, `c` is off by default, but the `b3sum` binary
crate activates it by default.
- The `rayon` feature no longer affects the entire API. Instead, it
provides the `join::RayonJoin` type for use with
`Hasher::update_with_join`, so that the caller can control when
multi-threading happens. Standalone API functions like `hash` are
always single-threaded now.
Changes since 0.1.3:
- Hasher supports the reset() method.
- Hasher implements several traits from the `digest` and `crypto_mac`
crates.
- Bug fixes in the C implementation for MSVC and for 32-bit x86.
Changes since 0.1.2:
- All x86 implementations include _mm_prefetch optimizations. These
improve performance for very large inputs.
- The C implementation performs parallel parent hashing, matching the
performance of the single-threaded Rust implementation.
- b3sum supports --no-mmap. Contributed by @cesarb.
Changes since 0.1.1:
- b3sum no longer mmaps files smaller than 16 KiB. This improves
performance for hashing many small files. Contributed by @xzfc.
- b3sum now supports --raw output. Contributed by @phayes.
Changes since 0.1.0:
- Optimizations contributed by @cesarb.
- Fix the build on x86_64-pc-windows-gnu when c_avx512 is enabled.
- Add an explicit error message for compilers that don't support c_avx512.
If AVX-512 is enabled, and the local C compiler doesn't support it, the
build is going to fail. However, if we check for this explicitly, we can
give a better error message.
Fixes https://github.com/BLAKE3-team/BLAKE3/issues/6.
Putting secret keys on the command line is bad practice, because command
line args are usually globally visible within the OS. Even if these
flags are mostly intended for testing and experimentation, we might as
well do the right thing. Plus this saves people the trouble of hex
encoding their keys.