Comparison of the effect of '-L' (LZP) and '-P' (Delta2) preprocessing options on compression algorithms
Legend of terminology used for abbreviated command names						System Configuration
pc-L-P-<algo>	pcompress -G -D -c <algo> -l <Compression Level>  -L -P -s 64m					HP Pavilion dv6
pc-P-<algo>	pcompress -G -D -c <algo> -l <Compression Level>  -P -s 64m					8GB RAM
pc-<algo>	pcompress -G -D -c <algo> -l <Compression Level>  -s 64m					Core i5 M430, 2.27 GHz
						500GB Hitachi Drive
Centos 6.2 x64 VMDK Tarball
Compression Level 6
	Size	Seconds
Original	2198056960	0
pc-L-P-lz4	692354801	64.04
pc-P-lz4	730106137	55.41
pc-lz4	743312225	55.16
pc-L-P-zlib	615237222	66.36
pc-P-zlib	655176032	61.57
pc-zlib	663498596	58.79
pc-L-P-ppmd	533612383	296.92
pc-P-ppmd	548360155	283.6
pc-ppmd	551527627	288.42
pc-L-P-bzip2	575358465	137
pc-P-bzip2	600139761	140.16
pc-bzip2	602772775	152.82
pc-L-P-libbsc	520789925	231.09
pc-P-libbsc	522061315	215.69
pc-libbsc	523237476	214.86
pc-L-P-lzmaMt	471635354	372.66
pc-P-lzmaMt	469153825	373.56
pc-lzmaMt	469341489	373.35
pc-L-P-lzma	471635354	399.86
pc-P-lzma	469153825	397.77
pc-lzma	469341489	396.1
Compression Level 9
	Size	Seconds
Original	2198056960	0
pc-L-P-lz4	694050897	59.14
pc-P-lz4	730106137	53.73
pc-lz4	743312225	55.58
pc-L-P-zlib	613444850	149.13
pc-P-zlib	651404239	153.93
pc-zlib	659862302	158.8
pc-L-P-ppmd	519755469	347.47
pc-P-ppmd	526079763	332.64
pc-ppmd	528006499	337.41
pc-L-P-bzip2	574686705	140.78
pc-P-bzip2	594473648	148.39
pc-bzip2	597583320	166.48
pc-L-P-libbsc	520919477	233.02
pc-P-libbsc	521945409	226.62
pc-libbsc	523125014	223.91
pc-L-P-lzmaMt	466770709	425.89
pc-P-lzmaMt	463784348	436.52
pc-lzmaMt	463574780	441.78
pc-L-P-lzma	466763566	467.44
pc-P-lzma	463783793	470.01
pc-lzma	463566134	470.31
Compression Level 14
	Size	Seconds
Original	2198056960	0
pc-L-P-lz4	694050897	60.05
pc-P-lz4	730106137	53.64
pc-lz4	743312225	55.75
pc-L-P-zlib	613444850	152.46
pc-P-zlib	651404239	152.08
pc-zlib	659862302	156.18
pc-L-P-ppmd	513455594	383.81
pc-P-ppmd	516421324	376.52
pc-ppmd	518384518	375.77
pc-L-P-bzip2	574686705	140.51
pc-P-bzip2	594473648	148.13
pc-bzip2	597583320	164.04
pc-L-P-libbsc	520919477	235.71
pc-P-libbsc	521945409	223.34
pc-libbsc	523125014	220.5
pc-L-P-lzmaMt	465917079	473.8
pc-P-lzmaMt	462829705	494.23
pc-lzmaMt	462764437	511.9
pc-L-P-lzma	465919771	520.17
pc-P-lzma	462838148	531.57
pc-lzma	462740545	544.06
Linux 3.6 RC2 Source Tarball
Compression Level 6
	Size	Seconds
Original	489093120	0
pc-L-P-lz4	118540102	15.99
pc-P-lz4	121962036	13.99
pc-lz4	121800239	13.65
pc-L-P-zlib	100502750	16.09
pc-P-zlib	104738574	14.12
pc-zlib	104461721	13.35
pc-L-P-ppmd	73277859	36.11
pc-P-ppmd	76643669	34.91
pc-ppmd	76217554	34.32
pc-L-P-bzip2	81823372	35.53
pc-P-bzip2	84228024	38.8
pc-bzip2	83916432	38.06
pc-L-P-libbsc	68655855	47.99
pc-P-libbsc	69014257	46.93
pc-libbsc	68833723	45.8
pc-L-P-lzmaMt	71561169	131.46
pc-P-lzmaMt	72173734	132.45
pc-lzmaMt	71966032	130.96
pc-L-P-lzma	71561169	131.39
pc-P-lzma	72173746	133.44
pc-lzma	71966032	130.6
Compression Level 9
	Size	Seconds
Original	489093120	0
pc-L-P-lz4	118573945	15.81
pc-P-lz4	121962036	14.25
pc-lz4	121800239	13.44
pc-L-P-zlib	99796948	21.66
pc-P-zlib	103809728	21.83
pc-zlib	103553004	21
pc-L-P-ppmd	67749329	49.66
pc-P-ppmd	69669887	48.44
pc-ppmd	69395124	47.65
pc-L-P-bzip2	80286786	38.65
pc-P-bzip2	82353966	41.17
pc-bzip2	82114529	40.43
pc-L-P-libbsc	69013023	48.88
pc-P-libbsc	68829997	48.17
pc-libbsc	69522944	161.4
pc-L-P-lzmaMt	69998285	167.96
pc-P-lzmaMt	69788584	167.29
pc-lzmaMt	69526616	168.71
pc-L-P-lzma	70005240	167.02
pc-P-lzma	69804193	169.53
pc-lzma	69526616	168.71
Compression Level 14
	Size	Seconds
Original	489093120	0
pc-L-P-lz4	118573945	16.08
pc-P-lz4	121962036	14.1
pc-lz4	121800239	13.57
pc-L-P-zlib	99796948	21.77
pc-P-zlib	103809728	20.96
pc-zlib	103553004	20.84
pc-L-P-ppmd	65495538	62.8
pc-P-ppmd	66440215	61.74
pc-ppmd	66158176	60.19
pc-L-P-bzip2	80286786	38.87
pc-P-bzip2	82353966	41.13
pc-bzip2	82114529	40.98
pc-L-P-libbsc	68663763	50.51
pc-P-libbsc	69013023	49.19
pc-libbsc	68829997	48.2
pc-L-P-lzmaMt	69188542	173.51
pc-P-lzmaMt	69582964	184.15
pc-lzmaMt	69382412	186.39
pc-L-P-lzma	69188834	181.04
pc-P-lzma	69586889	188.61
pc-lzma	69382586	190.39