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LZWVL   [2009]

Released by :
Doomed, WVL

Release Date :
6 August 2009

Type :
Other Platform C64 Tool

User rating:awaiting 8 votes (4 left)   See votestatistics

Credits :
Code .... Doomed of Padua
  WVL of Slash Design, Xenon

Download :

Look for downloads on external sites:
 Pokefinder.org


Production Info
Submitted by WVL on 6 August 2009
LZWVL is a sequence based command-line packer/cruncher that has a little bit worse compression compared to normal crunchers like Byteboozer or Pucrunch, but has a much faster depack.

LZWVL has 2 modes, a fast and a slow mode. The slow mode is only a little bit slower, but has a little bit better compression.

For geek's sake, I made a comparison using 9 different files from the Pearls for Pigs demo. All the 9 bins are compressed with my rle-packer, lzwvl in fast mode, lzwvl in slow mode, byteboozer and pucrunch in data mode.

Here's a graph showing the resulting compression vs # frames it takes to depack :



As you can see I was too lazy to measure how much time Pucrunch took to decrunch, but I'm betting it would be slower than Byteboozer any day ;)

Here's some more hard data :

filesizes

file	bin	rle	lzwvl-f	lzwvl-s	bb	pu	doynax
1	11008	8020	4529	4151	3383	3410	3265
2	4973	4314	3532	3309	2648	2687	2512
3	3949	3498	2991	2617	2187	2226	2108
4	7016	6456	4242	4085	3681	3595	3617
5	34760	27647	25781	24895	21306	20887	20405
6	31605	12511	11283	10923	9194	8877	8904
7	20392	17295	12108	11285	9627	9460	9289
8	5713	5407	4179	3916	3251	3314	3132
9	8960	7986	6914	6896	5586	5651	5430

filesize in %

1	100%	73%	41%	38%	31%	31%	30%
2	100%	87%	71%	67%	53%	54%	51%
3	100%	89%	76%	66%	55%	56%	53%
4	100%	92%	60%	58%	52%	51%	52%
5	100%	80%	74%	72%	61%	60%	59%
6	100%	40%	36%	35%	29%	28%	28%
7	100%	85%	59%	55%	47%	46%	46%
8	100%	95%	73%	69%	57%	58%	55%
9	100%	89%	77%	77%	62%	63%	61%

#frames to depack

1		11	13	14	58		27
2		5	7	7	38		17
3		4	6	6	28		12
4		8	9	9	43		20
5		36	39	42	300		119
6		20	25	25	126		49
7		22	25	26	138		60
8		6	8	8	43		18
9		9	12	12	73		32


Note : the depacker detects by itself if the file is in slow or fast mode and is in 64tass format. It also uses an illegal opcode, so you might need to replace that one (lax (zp),y).
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