Commit graph

15 commits

Author SHA1 Message Date
Moinak Ghosh
b0f41c2888 Add matrix transpose to Delta2 encoding.
Change confusing structure member name.
2012-12-13 21:18:16 +05:30
Moinak Ghosh
224fb529e9 Get rid of size_t in places where 64-bitness is assumed. 2012-12-09 10:15:06 +05:30
Moinak Ghosh
29b0d8fd7b Implement Adaptive Delta Encoding. 2012-12-05 00:09:47 +05:30
Moinak Ghosh
d054e0f713 Zlib optimizations. Use raw deflate streams to avoid unnecessary adler32.
Change some function signatures to improve algo init function behavior.
Fix corner case dedupe bug in error handling flow.
Bump archive version signature.
2012-11-22 21:02:50 +05:30
Moinak Ghosh
5b1a13480b Fix chunk flag setup when compression fails in adaptive mode.
Prevent display of non-fatal errors during compression.
2012-11-09 21:07:23 +05:30
Moinak Ghosh
3851c9c6cc Delay allocation of per-thread chunks for performance and memory efficiency.
Avoid allocating double-buffer for single-chunk files.
Introduce lzmaMt option to indicate multithreaded LZMA.
Update README.
2012-08-18 22:00:14 +05:30
Moinak Ghosh
9eac774eb1 Add multithreaded LZMA port from p7zip
Compute balanced thread count between chunk threads and algo threads
Generic way to handle querying algorithm parameters
Clean up unnecessary includes
2012-08-18 10:20:52 +05:30
Moinak Ghosh
203008def9 Further improve LZMA compression parameters to utilize all the 14 levels.
Tweak some Rabin parmeters for better reduction with zlib and Bzip2.
2012-07-30 23:30:13 +05:30
Moinak Ghosh
a873f92e41 Fix crash when decompressing deduped archive.
Ensure correct level is passed to lzma.
Avoid branch when wrapping rabin window position and check for rabin window size to be power of 2.
Update rabin parameters check for adaptive modes.
Add detection of 7-bit text/8-bit binary data for later use.
2012-07-10 20:14:23 +05:30
Moinak Ghosh
db0c9ea9ac Improve LZMA compression parameters at extreme levels.
Fix incorrect thread calculation.
Remove some cruft.
2012-07-09 23:28:11 +05:30
Moinak Ghosh
d3f5287ee5 Update License info to LGPLv3. 2012-07-07 22:18:29 +05:30
Moinak Ghosh
a1825a2305 Implement Parallel deduplication support.
Restructure compression functions to take chunk flag as argument.
Add missing error flag printing in LZMA.
Only create enough threads as needed by chunk size and file size.
Minor cleanups and variable name changes.
2012-07-01 21:44:02 +05:30
Moinak Ghosh
e46d3d10b3 Add basic compression statistics and new option to display them. 2012-05-31 21:36:33 +05:30
Moinak Ghosh
2eaf151ca0 New capability in allocator to add slab caches with user-specified size.
Use specific slab caches in main program and Lzma to slightly reduce memory footprint.
Fix missing hashtable counter update in allocator.
Slight cleanup of repeated computation with macro in Lzma.
2012-05-31 13:06:40 +05:30
Moinak Ghosh
07dfed7769 Initial Commit. 2012-05-28 20:19:29 +05:30