About
-----
XPK sublibrary based on LZMA SDK 4.43.


Requirements
------------
AmigaOS4 final and a PPC native xpkmaster.library.
To install it copy xpkLZMA.library into your LIBS:compressors directory.


Benchmarks
----------
Standard XPK benchmark (Canterbury Corpus, 11 files tested seperately),
but executed on an AmigaOne XE with 750FX/800 CPU:
Type  Num Version P    CSize     CTime      CSpd     UTime      USpd  Rate
LZMA:  80 52.1        494296      9.75    288286      0.17  16534024  82.4
BZP2: 100  1.7        543512      3.47    810024      1.33   2487419  80.7
GZIP: 100 50.4        730340      4.44    633059      0.12  23423200  74.0

Since the time resolution of xBench is too small to get usable results
that way, especially unpacking time and speed, I did another benchmark
using only one file created from the Canterbury Corpus by using "join
alice29.txt asyoulik.txt cp.html fields.c grammar.lsp kennedy.xls
lcet10.txt plrabn12.txt ptt5 sum xargs.1 as cantrbry":
Type  Num Version P    CSize     CTime      CSpd     UTime      USpd  Rate
LZMA:  19 52.2        678552      4.00    702696      0.20  14053920  75.9
LZMA:  39 52.2        596328      4.82    583150      0.18  15615466  78.8
LZMA:  59 52.2        544856      5.37    523423      0.16  17567400  80.7
LZMA:  69 52.2        509896      6.24    450446      0.14  20077028  81.9
LZMA:  79 52.2        490148      8.04    349600      0.14  20077028  82.6
LZMA:  89 52.2        487488      8.91    315463      0.14  20077028  82.7
LZMA: 100 52.2        485160      9.77    287695      0.14  20077028  82.8
BZP2: 100  1.7        565244      2.26   1243709      0.79   3557954  79.9
GZIP: 100 50.4        734960      4.41    637365      0.06  46846400  73.9
Same benchmark with some m68k XPK sublibraries and a xBench executable
wich doesn't disable the JIT:
SHRI: 100  2.2        704364     13.83    203238      0.88   3194072  75.0
MASH: 100  1.98       889832      7.10    395885      0.21  13384685  68.4
RAKE: 100  1.7        960732      1.35   2082062      0.08  35134800  65.9
FAST: 100  1.10      1038808      1.81   1552919      0.06  46846400  63.1


History
-------
52.2 (7.4.2007)
- Added modes with different dictionary sizes, version 52.1 used 1 MB
  (mode 80-89 in 52.2) and changed the default to 256 KB.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                 1137    2298  49.5% -lh5- b415 Apr  7 15:51 xpkLZMA.readme
[generic]                90328  207828  43.5% -lh5- 2a7e Apr  7 15:53 xpkLZMA.library
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         2 files   91465  210126  43.5%            Apr  8 17:17