dart_lz4 1.0.0 
dart_lz4: ^1.0.0 copied to clipboard
Pure Dart LZ4 and LZ4HC (block + frame) with streaming support.
Changelog #
All notable changes to this project will be documented in this file.
The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.
[Unreleased] #
1.0.0 - 2025-12-19 #
- Feature: Added
lz4SkippableEncodefor encoding skippable frames (user-defined metadata). - Feature: Added
lz4LegacyEncodefor encoding legacy LZ4 frames (lz4 -lformat). - Complete: All LZ4 frame formats now have full encode/decode support.
- Milestone: First stable release with 100% LZ4 frame specification coverage.
0.0.9 - 2025-12-18 #
- Feature: Added support for encoding LZ4 frames with a dictionary (
dictId). This allows for significantly better compression ratios on small payloads when sharing a dictionary. - Feature: Added support for encoding LZ4 frames with 64-bit
contentSize(previously limited to 4GiB). - Performance: Optimized
xxHash32(streaming) to use aligned memory access for better throughput.
0.0.8 - 2025-12-18 #
- Performance: Significant reduction in allocations for LZ4 frame encoding (sync and streaming) by reusing internal buffers.
- Performance: Optimized
xxHash32calculation using typed data views for ~1.5x speedup on aligned data. - API: Exposed
Lz4HcOptionsinlz4Compressto allow tuning LZ4HC compression (e.g.maxSearchDepth). - Example: Added comprehensive CLI example (
example/lz4_cli.dart).
0.0.7 - 2025-12-18 #
- Feature Parity: Achieved feature parity with LZ4 frame specification and other language implementations.
- Add
lz4FrameInfoto inspect frame metadata (flags, content size, dictionary ID, etc.) without decoding. - Add support for LZ4 frames with Dictionary ID (
dictId) viadictionaryResolvercallback inlz4FrameDecodeandlz4FrameDecoder. - Add support for 64-bit
contentSizein frame headers (previously limited to 4GiB). - Add convenience helpers
lz4CompressWithSizeandlz4DecompressWithSizefor simple size-prepended block compression.
0.0.6 - 2025-12-18 #
- Fix xxHash32 parity on dart2js by enforcing strict 32-bit arithmetic and updating vectors.
- Reduce allocations in LZ4 block and LZ4HC encoders by reusing scratch buffers.
- Optimize streaming frame encoder history window shifting.
- Make CLI interop tests VM-only so
dart test -p chromecan run withoutdart:iofailures. - Add benchmark baseline snapshot and a helper tool to compare benchmark output to baseline.
- Run full test suite on Chrome in CI.
0.0.5 - 2025-12-17 #
- Add legacy LZ4 frame decode support (
lz4 -l/ magic0x184C2102) for sync and streaming decoders. - Add additional frame interop vectors and streaming boundary tests.
- Add benchmark methodology docs and optional scheduled CI benchmark workflow.
- Add security/supply-chain workflows and maintainer documentation updates.
0.0.4 - 2025-12-16 #
- Add streaming LZ4 frame encode (
lz4FrameEncoder) alongside streaming decode. - Add CI enforcement for
dart docandpana 0.23.3. - Improve public API Dartdoc coverage.
- Update README and example for streaming frame encode usage.
0.0.3 - 2025-12-16 #
- Implement LZ4 block encode/decode.
- Implement LZ4 frame encode/decode and streaming frame decode.
- Add xxHash32 implementation, including incremental (streaming) support.
- Implement initial LZ4HC block compression and wire
lz4Compress(level: hc). - Add unit tests and benchmarks covering block/frame/LZ4HC.
0.0.2 - 2025-12-15 #
- Prepare v0.0.2 to validate automated publishing via GitHub Actions.
0.0.1 - 2025-12-15 #
- Initial repository scaffolding.
- Add core internal primitives (ByteReader/ByteWriter) and unit tests.
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Pure Dart LZ4 and LZ4HC (block + frame) with streaming support.
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Apache-2.0 (license)
