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1 | |
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2 | TODO: try unaligned copy again in decompressor |
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3 | TODO: allow size-optimised binaries by avoiding unrolling |
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4 | TODO: implement lzf_c_best in lzf. |
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5 | |
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6 | 3.8 (unreleased) |
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7 | - support a state arg for lzf_c_best. |
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8 | |
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9 | 3.7 (unreleased) |
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10 | - add lzf_c_best.c, a slower but better compressor. |
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11 | - switch to a multiplicative hash (developed with Steinar Gunderson), |
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12 | which is faster on modern cpus and compresses a bit better. The old |
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13 | hash function which uses only shifts is still available. |
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14 | - allow user configurable hash table slots, which makes it possible |
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15 | to use e.g. 16 bit offsets for a smaller hashtable (if your data is |
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16 | always < 64kb). |
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17 | - use _WIN32, not WIN32, when testing for windows (fails with bcc), |
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18 | patch by Tamas Tevesz. |
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19 | - try to port to win64+gcc, which is non-posix but doesn't have _int64 |
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20 | (reported by Maciej Adamczyk). |
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21 | |
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22 | 3.6 Mon Feb 7 17:37:31 CET 2011 |
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23 | - fixed hash calculation in C♯ version (Tiago Freitas Leal). |
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24 | - unroll copy for small sizes, use memcpy for larger sizes, |
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25 | greatly speeding up decompression in most cases. |
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26 | - finally disable rep movsb - it's a big loss on modern intel cpus, |
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27 | and only a small win on amd cpus. |
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28 | - improve C++ compatibility of the code. |
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29 | - slightly improve compressor speed. |
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30 | - halved memory requirements for compressor on 64 bit architectures, |
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31 | which can improve the speed quite a bit on older cpus. |
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32 | |
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33 | 3.5 Fri May 1 02:28:42 CEST 2009 |
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34 | - lzf_compress did sometimes write one octet past the given output |
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35 | buffer (analyzed and nice testcase by Salvatore Sanfilippo). |
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36 | |
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37 | 3.4 Tue Sep 2 06:45:00 CEST 2008 |
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38 | - the fix from 3.3 introduced a compression bug, which is fixed in |
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39 | this release (which explains the mysterious prerelease...). Thanks |
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40 | once more to Clément Calmels. |
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41 | |
| 1 | 3.3 Mon Aug 25 03:17:42 CEST 2008 |
42 | 3.3 Mon Aug 25 03:17:42 CEST 2008 |
| 2 | - lzf_compress could access memory after the given input buffer |
43 | - lzf_compress could access memory after the given input buffer |
| 3 | when outputting back references. reported with nice testcase |
44 | when outputting back references. reported with nice testcase |
| 4 | by Clément Calmels. |
45 | by Clément Calmels. |
| 5 | |
46 | |
| … | |
… | |
| 31 | 2.1 Fri Nov 2 13:34:42 CET 2007 |
72 | 2.1 Fri Nov 2 13:34:42 CET 2007 |
| 32 | - switched to a 2-clause bsd license with GPL exception. |
73 | - switched to a 2-clause bsd license with GPL exception. |
| 33 | - get rid of memcpy. |
74 | - get rid of memcpy. |
| 34 | - tentatively use rep movsb on x86 and x86_64 (gcc only) for a |
75 | - tentatively use rep movsb on x86 and x86_64 (gcc only) for a |
| 35 | moderate speed improvement. |
76 | moderate speed improvement. |
| 36 | - applied patch by Kein-Hong Man to maske lzf.c compile under |
77 | - applied patch by Kein-Hong Man to make lzf.c compile under |
| 37 | the crippled mingw32 environment. |
78 | the crippled mingw32 environment. |
| 38 | |
79 | |
| 39 | 2.0 Fri Feb 16 23:11:18 CET 2007 |
80 | 2.0 Fri Feb 16 23:11:18 CET 2007 |
| 40 | - replaced lzf demo by industrial-strength lzf utility with behaviour |
81 | - replaced lzf demo by industrial-strength lzf utility with behaviour |
| 41 | similar other compression utilities. Thanks for Stefan Traby for |
82 | similar other compression utilities. Thanks for Stefan Traby for |
