paq8hp11

[Matt Mahoney]

Alexander Ratushnyak has submitted paq8hp11 as a Hutter prize entry.
It is open for 30 days public comment.

> http://binet.com.ua/~artest/HKCC/paq8hp11.zip
> http://artst.narod.ru/b/paq8hp11.zip (the same file on another site)
>
> This executable is build for '-7' switch, as the previous paq8hp10,
> and should be used with -7 only:
>
> paq8hp11.exe -7 archive_name enwik8

I confirmed paq8hp11 compression and decompression of enwik8.
http://cs.fit.edu/~mmahoney/compression/text.html

16,459,515 enwik8.paq8hp11
99,816 PAQ8HP11.EXE
16,559,331 total size

Tested on a 2.2 GHz Athlon-64 with 2 GB memory under WinXP home.
Compression
time is 12954 sec. Decompression time is 12853 sec. Both are process
times
(timer 3.01), about 98% of real time. Windows Task Manager shows
memory usage
at 889,000 KB at the start of compression, gradually increasing to
947,000 KB
just before finishing. Memory usage is the same for both compression
and
decompression. Both compression and decompression leave a temporary
dictionary file in the current directory, which I deleted before
beginning the
decompression test.

465,211 temp_HKCC_dict1.dic

[James Bowery]

My results were the same for an AMD Athlon Xp 2100+ 1.73 GHz with 1.25
GB of RAM except it took compression and decompression took almost
exactly 6 hours.

[attila]

Could someone please send me the md5 (or other hash) of the compressed
archive? I don't have enough memory, but I'll try to do it with
virtual memory, probably under wine environment, and I want to be sure
I have the right file before trying to uncompress (it will be a time
consuming process). I hope I'm not asking too much...

[Matt Mahoney]

Oh, sorry, I deleted it after the test. Do you already have the
compressed file? It should be 16,459,515 bytes.

-- Matt Mahoney

[Attila Olah]

No, not yet. I was a bit busy, but now that paq8hp11any is out, i can
compress it with 512 Mb. Thanks anyway.

[Matt Mahoney]

On May 14 I confirmed compression and decompression for paq8hp12 -7
enwik8.
http://cs.fit.edu/~mmahoney/compression/text.html#1330

16,381,959 enwik8.paq8hp12
99,696 PAQ8HP12.EXE
16,481,655 total size

Timer 3.01 process time was 13082 sec. to compress, 13148 sec. to
decompress
on a 2.2 GHz Athlon 64 3500+ with 2 GB memory. Windows Task Manager
showed
936 MB near the end of compression.

MD5 checksums:
a1fa5ffddb56f4953e226637dabbb36a *enwik8 (output)
1a4a3a65f8c4aa3c3c588e526e41d723 *enwik8.paq8hp12
a1fa5ffddb56f4953e226637dabbb36a *enwik8.tmp (input)

The archive checksum depends on the file name and is case sensitive.
The
archive header should look like this:

paq8h -7
100000000 enwik8

--- Alexander Ratushnyak wrote:

> Hello gentlemen,
> here's my next submission to the Contest:
> http://binet.com.ua/~artest/HKCC/paq8hp12.zip
> http://artst.narod.ru/b/paq8hp12.zip (the same file on another site)
>
> This executable is build for '-7' switch, as before,

> and should be used with -7 only:
>

> paq8hp12.exe -7 archive_name enwik8
>
> With best kind regards,
> A.Ratushnyak,
> http://compression.ru
>
>