77 lines
3.8 KiB
Text
77 lines
3.8 KiB
Text
== 0.8.1 Bugfix Release ==
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Fix return code handling in LZP pre-compression, crashed adaptive modes.
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Allow user-specified minimum Dedupe block size.
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Compute similarity sketch only if Delta Compression enabled.
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Fix secondary sketch computation, some more accuracy in diff detection.
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Add xxHash for Rabin block checksums, slightly faster than CRC64.
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Fix missing initialization of character counts table.
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Some file reorganization.
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Add ASM version of Skein for x64 platforms with auto-detection
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Error checking for checksum flag when decompressing
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Add support for Skein512 and Skein256 checksums
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Import Skein code from NIST CD submission
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Make checksum algorithms pluggable
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Fix handling of huge buffers (>2GB) in LZP
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Cleanup of some buffer sizing code
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== 0.8 Beta release ==
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Add support for libbsc a high-performance block sorting compressor.
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Enable external algorithm threading for single chunk compressed files.
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Add config script to generate Makefile based on flags.
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Add install target and installation readme file.
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Improve memory efficiency when total file size < total size of chunks.
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Fix freeing of Zlib structures.
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Add LZP Pre-Compression support ported from libbsc.
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Add generic pre-processing wrappers for future support of other pre-processors.
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Clean up computation of Rabin block sizes.
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Compute Rabin scratch space accurately to avoid RAM wastage.
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Delay allocation of per-thread chunks for performance and memory efficiency.
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Avoid allocating double-buffer for single-chunk files.
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Introduce lzmaMt option to indicate multithreaded LZMA.
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Add multithreaded LZMA port from p7zip
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Compute balanced thread count between chunk threads and algo threads
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Generic way to handle querying algorithm parameters
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Clean up unnecessary includes
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Speed up sort comparator function.
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Reduce memory consumption and improve performance in dedupe
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Re-introduce crc64 for dedup blocks to avoid wasted memcpy-s
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Restructe block array to be an array of pointers allocated on demand
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Fix a corner case issue when splitting chunks at a dedup boundary
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Improve Rabin computations using an irreducible polynomial
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Slight improvement to similarity computation
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A simple mechanism to include DEBUG mode stats
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Implement secondary sketch based on character counts to refine similarity checksum.
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Proper checksum update for last block.
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== 0.7 Beta release ==
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Bump version to 0.7
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Fix handling of compression flags in adaptive mode
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Fix error handling when chunk size is too small for dedupe
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Fix initialization of adaptive modes.
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Compute and compare Mean sketch cksum to improve similarity comparison
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Fix optflags settings in Makefile
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Small optimization in zero RLE encoder to avoid scanning during lookahead
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Some minor fixes
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Bias fingerprint value with occurrence counts for a better sketch
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Fix latent bug when calling algo deinit in decompression code
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Reduce diff threshold for slightly greater delta encoding
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Limit similar buffer size difference for less wasted diffing
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Change zlib compression wrapper to use faster deflateReset mechanism
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Reduce optimization level for Dedupe code, it goes faster
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Fix handling of incompressible chunks.
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Fix handling of various dedup failures.
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Add NULL compression option for dedup only compression.
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Remove unneeded checks in qsort comparator.
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Fix buffer sizing for LZ4.
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Fix exit condition checks in LZ4 decompression wrapper.
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Fix buffer size calculation when decompressing LZ4, Zlib and Bzip2 compressed chunks.
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Slight SSE optimization in LZ4HC.
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== 0.6 Alpha bugfix release ==
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Fix crash when algo init function returns error.
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Fix LZFX error handling.
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More updates to README.
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Further improve LZMA compression parameters to utilize all the 14 levels.
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Tweak some Rabin parmeters for better reduction with zlib and Bzip2.
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Increase the small size slabs a bit.
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Fix slab sizing.
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Fix buffer size computation when allocating Rabin block array.
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Reduce memory usage of Rabin block array.
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Add an SSE optimization for bsdiff.
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