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encode
Admin
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# Posted: 9 Jul 2006 22:13 | Edited by: encode
Hi all!
Let me introduce the brand new BWT-based file archiver - DARK by Dima Malyshev.
It uses BWT+DC algorithm.
Memory usage:
Compression: 6*N
Decompression: 5*N
Where N is blocksize.
Author: Dima Malyshev aka kvark
Enjoy!
Link:
Download DARK 0.32b (31 KB)
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encode
Admin
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# Posted: 9 Jul 2006 22:50 | Edited by: encode
DARK 0.32b on Large Text Compression Benchmark:
ENWIK8: 21,414,479 bytes
ENWIK9: 185,687,885 bytes (c 755 sec, d 493 sec)
Memory usage for compression: 780+ MB
P4 3.0 GHz, 1 GB RAM, Windows XP SP2
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LovePimple
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# Posted: 11 Jul 2006 01:33
DARK crashes on the MFC testset. 
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encode
Admin
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# Posted: 11 Jul 2006 11:33
I inform author about that. Unfortunately, he traveling now.
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LovePimple
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# Posted: 23 Jul 2006 04:18
Dark has performed well on Matt's large text benchmark.
http://www.cs.fit.edu/~mmahoney/compression/text.h tml
Pretty fast compression/decompression times too!
Dwing's uda 0.300 also performs well and it is much faster than PAQ8H.
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LovePimple
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# Posted: 25 Jul 2006 03:24
UDA 0.300 shows its superior speed on the MFC test.
http://www.maximumcompression.com/data/summary_mf. php
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LovePimple
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# Posted: 2 Aug 2006 21:54
Any idea when we will have an update of DARK?
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encode
Admin
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# Posted: 2 Aug 2006 22:53
I believe it will be at the end of the summer... 
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LovePimple
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# Posted: 3 Aug 2006 03:32
Good! I like this compressor.
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kvark
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# Posted: 5 Aug 2006 02:31
Oh, it's definitely very nice!
Sorry, I was travelling... Today's version of dark is 'dark-0.35beta'
I made it work 20-50% faster on 'bad' input (This doesn't include texts, but binaries - also gain some speed).
I have developed a very fast MTF en/de algorithm, that makes my DC work faster. Now I'm trying to increase compression ratio... This is definitely harder, but, who knows? 
http://kvark.at.tut.by/dark-35b.exe
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LovePimple
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# Posted: 5 Aug 2006 16:32
Thanks for the update!
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kvark
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# Posted: 5 Aug 2006 17:48
Welcome:
http://darchiver.narod.ru
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LovePimple
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# Posted: 5 Aug 2006 21:32
Thank You!
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LovePimple
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# Posted: 6 Aug 2006 15:21
Dark is still crashing on Werner's MFC test.
http://www.maximumcompression.com/
Any idea what's causing this?
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encode
Admin
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# Posted: 6 Aug 2006 15:38
From DARK's homepage:
Why always beta?
It's a pity that BWT stage (Archon) doesn't guarantee 100% stability. Archon3r2 had been developed to participate in Yuta Mori's contests (speed of SA construction) and has some defects...
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kvark
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# Posted: 9 Aug 2006 15:48
It wasn't easy, but I've made some corrections to Archon3r2...
I've been running from that moment very long time, but the time has come and I did it, finally...
I really want to see the MFC test passed 
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encode
Admin
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# Posted: 9 Aug 2006 15:52
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LovePimple
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# Posted: 9 Aug 2006 20:16
It wasn't easy, but I've made some corrections to Archon3r2...
I've been running from that moment very long time, but the time has come and I did it, finally...
I really want to see the MFC test passed
Thanks for the update!
I really like this compressor but would feel much happier about using myself if it compressed Werners MFC without crashing.
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kvark
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# Posted: 10 Aug 2006 21:58
I'm soory, I didn't mind to check myself earlier, about MFC test.
So, I've checked: dark v0.35b doesn't crash on my machine...
It compresses and then extracts files correctly
Did you try it on your own, LovePimple?
To tell the truth, ver 0.37a is waiting, but will not be published unless the problem with MFC is solved. It's because I really want to see the stable dark, not beta
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LovePimple
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# Posted: 10 Aug 2006 22:04
It compresses and then extracts files correctly
Did you try it on your own, LovePimple?
Yes, it seems to work OK on mine.
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kvark
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# Posted: 10 Aug 2006 22:05
Thanx!! but... I've mistaken.
I've checked on SFC, not MFC. Where can I find MFC testfiles?
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kvark
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# Posted: 10 Aug 2006 22:11
I did it!!!
Why didn't I look into maximumcompression guestbook before?..
Werner(is he?) told that it craches when:
dark-35b e -b1m q mso97.dll
But now it works correctly
I'm updating my homepage... The new version 0.37a shows a big improvement
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LovePimple
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# Posted: 11 Aug 2006 02:07
Thanx!! but... I've mistaken.
I've checked on SFC, not MFC. Where can I find MFC testfiles?
They are not available to the public. I just use my own version of the MFC test.
Read this:
http://www.maximumcompression.com/data/summary_mf. php
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LovePimple
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# Posted: 11 Aug 2006 02:13
I did it!!!
Why didn't I look into maximumcompression guestbook before?..
Werner(is he?) told that it craches when:
dark-35b e -b1m q mso97.dll
But now it works correctly
I'm updating my homepage... The new version 0.37a shows a big improvement
Thanks for the update!
Now we will have to wait until Werner tests it on his MFC testset to see if it crashes.
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kvark
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# Posted: 11 Aug 2006 02:59
And finally!! It doesn't crash anymore!!!!!
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LovePimple
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# Posted: 11 Aug 2006 17:08
And finally!! It doesn't crash anymore!!!!!
That's excellent news!!! 
Could you please add wildcard support to Dark?
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kvark
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# Posted: 12 Aug 2006 00:18
New dark-0.38b supports folders, isn't it worser than wildcards?
But if you still be requesting wildcards, I'll do that.
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LovePimple
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# Posted: 12 Aug 2006 01:59
New dark-0.38b supports folders, isn't it worser than wildcards?
But if you still be requesting wildcards, I'll do that.
Please!
Dark is a great little file compressor. If it had files/folders + wildcards it would be a FANTASTIC archiver!!!
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kvark
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# Posted: 12 Aug 2006 08:42
NO PROBLEMO
But there is one question.
Is it acceptable that dark will try to compress it's output file (and crash) when you try "dark c q.dark *.*"?
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encode
Admin
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# Posted: 12 Aug 2006 10:56
But you can exclude the archive name from file list!
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