Re: PAQ7 released

Matt Mahoney wrote:
> I just posted my newest compressor, PAQ7, to
> http://cs.fit.edu/~mmahoney/compression/#paq7

Some results on the Calgary corpus. There are 5 memory level settings.
They all run about the same speed. Tested on a 2.2 GHz Athlon-64
3500+ with 1 GB RAM (in 32 bit mode under WinXP). This is a solid
archive.

paq7 -1 (lowest memory setting, about 56 MB)
111261 BIB: -> 21592
768771 BOOK1: -> 199430
610856 BOOK2: -> 123431
102400 GEO: -> 44832
377109 NEWS: -> 89025
21504 OBJ1: -> 7799
246814 OBJ2: -> 49829
53161 PAPER1: -> 11331
82199 PAPER2: -> 17578
513216 PIC: -> 23303
39611 PROGC: -> 8788
71646 PROGL: -> 10236
49379 PROGP: -> 7294
93695 TRANS: -> 11263
3141622 -> 625924 (1.5939 bpc) in 172.70 sec (18.191 KB/sec)
Time 172.70 sec, memory 56440419 bytes

paq7 -5 (highest memory setting, about 500 MB)
111261 BIB: -> 21493
768771 BOOK1: -> 194933
610856 BOOK2: -> 120373
102400 GEO: -> 44561
377109 NEWS: -> 86395
21504 OBJ1: -> 7755
246814 OBJ2: -> 48216
53161 PAPER1: -> 10809
82199 PAPER2: -> 16812
513216 PIC: -> 23201
39611 PROGC: -> 8628
71646 PROGL: -> 10189
49379 PROGP: -> 7299
93695 TRANS: -> 10827
3141622 -> 611684 (1.5576 bpc) in 177.66 sec (17.684 KB/sec)
Time 177.67 sec, memory 525842019 bytes

paq7 -3 (default setting, 150 MB) on a 750 MHz Duron (192 MB memory)
under WinMe:
111261 BIB: -> 21500
768771 BOOK1: -> 195555
610856 BOOK2: -> 120863
102400 GEO: -> 44643
377109 NEWS: -> 86932
21504 OBJ1: -> 7744
246814 OBJ2: -> 48670
53161 PAPER1: -> 10905
82199 PAPER2: -> 16970
513216 PIC: -> 23229
39611 PROGC: -> 8652
71646 PROGL: -> 10172
49379 PROGP: -> 7272
93695 TRANS: -> 10909
3141622 -> 614209 (1.5641 bpc) in 710.08 sec (4.424 KB/sec)
Time 710.13 sec, memory 150320739 bytes

-- Matt Mahoney

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