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1 | |
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2 | 3.2 |
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3 | - include a workaround for failing POSIX and real-world compliance |
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4 | on 64 bit windows (microsoft claims to support POSIX, but is far |
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5 | from it). (bug found and analysed nicely by John Lilley). |
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6 | |
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7 | 3.1 Fri Nov 30 11:33:04 CET 2007 |
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8 | - IMPORTANT BUGFIX: a too long final literal run would corrupt data |
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9 | in the encoder (this was introduced in 3.0 only, earlier versions |
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10 | are safe). |
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11 | |
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12 | 3.0 Tue Nov 13 22:13:09 CET 2007 |
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13 | - switched to 2-clause bsd with "GPL v2 or any later version" option. |
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14 | - speed up compression by ~10-15% in common cases |
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15 | by some manual unrolling. |
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16 | - import some compiler tricks from JSON::XS, for further speed-ups. |
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17 | - tune hash functions depending on ULTRA_FAST or VERY_FAST settings. |
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18 | - for typical binary data (e.g. /bin/bash, memory dumps, |
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19 | canterbury corpus etc.), speed is now comparable to fastlz, but |
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20 | with better compression ratio. with ULTRA_FAST, it's typically |
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21 | 3-15% faster than fastlz while still maintaining a similar ratio. |
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22 | (amd64 and core 2 duo, ymmv). thanks a lot for the competition :) |
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23 | - undo inline assembly in compressor, it is no longer helpful. |
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24 | - no changes to the decompressor. |
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25 | - use a HLOG of 16 by default now (formerly 15). |
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26 | |
| 1 | 2.1 Fri Nov 2 13:34:42 CET 2007 |
27 | 2.1 Fri Nov 2 13:34:42 CET 2007 |
| 2 | - switched to a 2-clause bsd license with GPL exception. |
28 | - switched to a 2-clause bsd license with GPL exception. |
| 3 | - get rid of memcpy. |
29 | - get rid of memcpy. |
| 4 | - tentatively use rep movsb on x86 and x86_64 (gcc only) for a |
30 | - tentatively use rep movsb on x86 and x86_64 (gcc only) for a |
| 5 | moderate speed improvement. |
31 | moderate speed improvement. |
