[ViewVC] Contents of: cvs/liblzf/Changes

2.2
        - switched to GPL v2 or any later version.
        - speed up compression by ~10-15% in common cases
          by some manual unrolling.
        - import some compiler tricks from JSON::XS.
        - tune hash functions depending on ULTRA_FAST or VERY_FAST settings.
        - for typical binary data (e.g. /bin/bash, memory dumps,
          canterbury corpus etc.), speed is now comparable to fastlz, but
          with better compression ratio. with ULTRA_FAST, it's typically
          3-15% faster than fastlz while still maintaining a similar ratio.
          (amd64 and core 2 duo, ymmv). thanks a lot for the competition :)
        - undo inline assembly, it is no longer helpful.

2.1  Fri Nov  2 13:34:42 CET 2007
        - switched to a 2-clause bsd license with GPL exception.
        - get rid of memcpy.
        - tentatively use rep movsb on x86 and x86_64 (gcc only) for a
          moderate speed improvement.
        - applied patch by Kein-Hong Man to maske lzf.c compile under
          the crippled mingw32 environment.

2.0  Fri Feb 16 23:11:18 CET 2007
        - replaced lzf demo by industrial-strength lzf utility with behaviour
          similar other compression utilities. Thanks for Stefan Traby for
          rewriting it!
        - fix state arg prototype.

1.7  Wed Sep 27 17:29:15 CEST 2006
        - remove bogus "unlzf" patch.
          note to self: never accept well-meant patches.
        - make lzf more robust in presence of padding bytes or sudden eof.

1.6  Fri Jul  7 17:31:26 CEST 2006
        - the lzf example utility will now uncompress if invoked
          as "unlzf" (patch by Scott Feeney).
        - add CHECK_INPUT option that adds more checks for input
          data validity.
        - help applications that do not pass in the correct length
          (such as php) by returning either EINVAL or E2BIG.
        - default HLOG size is now 15 (cpu caches have increased).
        - documentation fixes.

1.51 Thu Apr 14 22:15:46 CEST 2005
        - incorporated C♯ implementation of both the en- and decoder,
          written by "Oren J. Maurice <oymaurice@hazorea.org.il>".
          You can find it in the cs/ subdirectory.
        - make FRST, NEXT IDX overridable if lzf_c.c is directly included
          in the code.

1.5  Tue Mar  8 20:23:23 CET 2005
        - incorporated improvements by Adam D. Moss,
          which includes a new VERY_FAST mode which is
          a bit slower than ULTRA_FAST but much better,
          and enabled it as default.

1.401 Thu Mar  3 18:00:52 CET 2005
        - use cstring in c++, not string.h.
        - change of contact address.

1.4  Wed Dec 15 08:08:49 CET 2004
        - very very slight tuning of the hashing function.

1.3  Thu Mar 25 15:41:17 CET 2004
        - changed license of lzf core code to explicitly allow
          relicensing under the GPLv2.
        - added VPATH support as suggested by Björn Eriksson.

1.2  Mon Dec 29 13:47:28 CET 2003
        - avoid spurious memory accesses after the to-be-compressed
          memory region. originally reported by Michal Zalewski.
        - flip LZF_STACK_ARG meaning (to be correct).

1.1  Tue Dec 23 05:48:32 CET 2003
        - removed #warn directive, it's not worth the hassle.
        - add LZF_STACK_ARG and AVOID_ERRNO configurations
          for embedded systems.
        - make it compile cleanly as c++.
        - some small documentation and code fixes.

1.0  Sun Nov 17 12:37:37 CET 2002
        - slightly better compression ratio, almost unmeasurably
          slower.
        - some documentation fixes.

0.4  Thu Jun 13 14:11:10 CEST 2002
        - typoe fix.
        - lzf demo program now properly decompresses small files.
        - fix another 64 bit issue, found by Laurent Deniel.

0.3  Tue Jan 16 13:21:14 CET 2001
        - fix silly beginners 32/64 bit mistake.

0.2  Thu Jan  4 05:56:42 CET 2001
        - now totally independent of autoconfig, for
          easy inclusion into other programs.
        - much better fine-tuning, faster and better than 0.1.

0.1  2000
        - initial release.
Revision:	1.34
Committed:	Tue Nov 13 10:48:02 2007 UTC (16 years, 6 months ago) by root
Branch:	MAIN
Changes since 1.33:	+3 -2 lines
Log Message:	* empty log message *
#	Content
1	2.2
2	- switched to GPL v2 or any later version.
3	- speed up compression by ~10-15% in common cases
4	by some manual unrolling.
5	- import some compiler tricks from JSON::XS.
6	- tune hash functions depending on ULTRA_FAST or VERY_FAST settings.
7	- for typical binary data (e.g. /bin/bash, memory dumps,
8	canterbury corpus etc.), speed is now comparable to fastlz, but
9	with better compression ratio. with ULTRA_FAST, it's typically
10	3-15% faster than fastlz while still maintaining a similar ratio.
11	(amd64 and core 2 duo, ymmv). thanks a lot for the competition :)
12	- undo inline assembly, it is no longer helpful.
13
14	2.1 Fri Nov 2 13:34:42 CET 2007
15	- switched to a 2-clause bsd license with GPL exception.
16	- get rid of memcpy.
17	- tentatively use rep movsb on x86 and x86_64 (gcc only) for a
18	moderate speed improvement.
19	- applied patch by Kein-Hong Man to maske lzf.c compile under
20	the crippled mingw32 environment.
21
22	2.0 Fri Feb 16 23:11:18 CET 2007
23	- replaced lzf demo by industrial-strength lzf utility with behaviour
24	similar other compression utilities. Thanks for Stefan Traby for
25	rewriting it!
26	- fix state arg prototype.
27
28	1.7 Wed Sep 27 17:29:15 CEST 2006
29	- remove bogus "unlzf" patch.
30	note to self: never accept well-meant patches.
31	- make lzf more robust in presence of padding bytes or sudden eof.
32
33	1.6 Fri Jul 7 17:31:26 CEST 2006
34	- the lzf example utility will now uncompress if invoked
35	as "unlzf" (patch by Scott Feeney).
36	- add CHECK_INPUT option that adds more checks for input
37	data validity.
38	- help applications that do not pass in the correct length
39	(such as php) by returning either EINVAL or E2BIG.
40	- default HLOG size is now 15 (cpu caches have increased).
41	- documentation fixes.
42
43	1.51 Thu Apr 14 22:15:46 CEST 2005
44	- incorporated C♯ implementation of both the en- and decoder,
45	written by "Oren J. Maurice <oymaurice@hazorea.org.il>".
46	You can find it in the cs/ subdirectory.
47	- make FRST, NEXT IDX overridable if lzf_c.c is directly included
48	in the code.
49
50	1.5 Tue Mar 8 20:23:23 CET 2005
51	- incorporated improvements by Adam D. Moss,
52	which includes a new VERY_FAST mode which is
53	a bit slower than ULTRA_FAST but much better,
54	and enabled it as default.
55
56	1.401 Thu Mar 3 18:00:52 CET 2005
57	- use cstring in c++, not string.h.
58	- change of contact address.
59
60	1.4 Wed Dec 15 08:08:49 CET 2004
61	- very very slight tuning of the hashing function.
62
63	1.3 Thu Mar 25 15:41:17 CET 2004
64	- changed license of lzf core code to explicitly allow
65	relicensing under the GPLv2.
66	- added VPATH support as suggested by Björn Eriksson.
67
68	1.2 Mon Dec 29 13:47:28 CET 2003
69	- avoid spurious memory accesses after the to-be-compressed
70	memory region. originally reported by Michal Zalewski.
71	- flip LZF_STACK_ARG meaning (to be correct).
72
73	1.1 Tue Dec 23 05:48:32 CET 2003
74	- removed #warn directive, it's not worth the hassle.
75	- add LZF_STACK_ARG and AVOID_ERRNO configurations
76	for embedded systems.
77	- make it compile cleanly as c++.
78	- some small documentation and code fixes.
79
80	1.0 Sun Nov 17 12:37:37 CET 2002
81	- slightly better compression ratio, almost unmeasurably
82	slower.
83	- some documentation fixes.
84
85	0.4 Thu Jun 13 14:11:10 CEST 2002
86	- typoe fix.
87	- lzf demo program now properly decompresses small files.
88	- fix another 64 bit issue, found by Laurent Deniel.
89
90	0.3 Tue Jan 16 13:21:14 CET 2001
91	- fix silly beginners 32/64 bit mistake.
92
93	0.2 Thu Jan 4 05:56:42 CET 2001
94	- now totally independent of autoconfig, for
95	easy inclusion into other programs.
96	- much better fine-tuning, faster and better than 0.1.
97
98	0.1 2000
99	- initial release.