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Comparison of the
effect of '-L' (LZP) and '-P' (Delta2) preprocessing options on compression
algorithms |
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Legend
of terminology used for abbreviated command names |
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System Configuration |
|
pc-L-P-<algo> |
pcompress -G -D -c
<algo> -l <Compression Level>
-L -P -s 64m |
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HP Pavilion dv6 |
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pc-P-<algo> |
pcompress -G -D -c
<algo> -l <Compression Level>
-P -s 64m |
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8GB RAM |
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pc-<algo> |
pcompress -G -D -c
<algo> -l <Compression Level>
-s 64m |
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Core i5 M430, 2.27 GHz |
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500GB Hitachi Drive |
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Centos
6.2 x64 VMDK Tarball |
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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 |
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|
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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 |
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|
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 |
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Linux
3.6 RC2 Source Tarball |
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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 |
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|
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Compression Level 9 |
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|
Size |
Seconds |
|
Original |
489093120 |
0 |
|
pc-L-P-lz4 |
118573945 |
15.81 |
|
pc-P-lz4 |
121962036 |
14.25 |
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pc-lz4 |
121800239 |
13.44 |
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pc-L-P-zlib |
99796948 |
21.66 |
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pc-P-zlib |
103809728 |
21.83 |
|
pc-zlib |
103553004 |
21 |
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pc-L-P-ppmd |
67749329 |
49.66 |
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pc-P-ppmd |
69669887 |
48.44 |
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pc-ppmd |
69395124 |
47.65 |
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pc-L-P-bzip2 |
80286786 |
38.65 |
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pc-P-bzip2 |
82353966 |
41.17 |
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pc-bzip2 |
82114529 |
40.43 |
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pc-L-P-libbsc |
69013023 |
48.88 |
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pc-P-libbsc |
68829997 |
48.17 |
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pc-libbsc |
69522944 |
161.4 |
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pc-L-P-lzmaMt |
69998285 |
167.96 |
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pc-P-lzmaMt |
69788584 |
167.29 |
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pc-lzmaMt |
69526616 |
168.71 |
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pc-L-P-lzma |
70005240 |
167.02 |
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pc-P-lzma |
69804193 |
169.53 |
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pc-lzma |
69526616 |
168.71 |
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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 |
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