bzip2 と xz の比較

root@sv tmp]# /usr/bin/time -v xz -9 youme-20140223-11hour.pcap 
	Command being timed: "xz -9 youme-20140223-11hour.pcap"
	User time (seconds): 574.53
	System time (seconds): 2.16
	Percent of CPU this job got: 99%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 9:37.74
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 2759904
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 1
	Minor (reclaiming a frame) page faults: 170496
	Voluntary context switches: 20
	Involuntary context switches: 4595
	Swaps: 0
	File system inputs: 1054840
	File system outputs: 446224
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 0

[root@sv tmp]# /usr/bin/time -v xz youme-20140223-11hour.pcap
	Command being timed: "xz youme-20140223-11hour.pcap"
	User time (seconds): 436.28
	System time (seconds): 1.54
	Percent of CPU this job got: 99%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 7:18.77
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 384224
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 4
	Minor (reclaiming a frame) page faults: 24048
	Voluntary context switches: 12
	Involuntary context switches: 4809
	Swaps: 0
	File system inputs: 1030472
	File system outputs: 442800
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 0

[root@sv tmp]# /usr/bin/time -v xz -6 youme-20140223-11hour.pcap
	Command being timed: "xz -6 youme-20140223-11hour.pcap"
	User time (seconds): 471.36
	System time (seconds): 3.86
	Percent of CPU this job got: 99%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 7:58.38
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 384512
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 4
	Minor (reclaiming a frame) page faults: 20501
	Voluntary context switches: 83
	Involuntary context switches: 9157
	Swaps: 0
	File system inputs: 1120024
	File system outputs: 475480
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 0

[root@sv tmp]# /usr/bin/time -v bzip2 -9 youme-20140223-11hour.pcap 
	Command being timed: "bzip2 -9 youme-20140223-11hour.pcap"
	User time (seconds): 68.78
	System time (seconds): 0.46
	Percent of CPU this job got: 99%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 1:09.45
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 28176
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 2
	Minor (reclaiming a frame) page faults: 1792
	Voluntary context switches: 5
	Involuntary context switches: 92
	Swaps: 0
	File system inputs: 200
	File system outputs: 480072
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 0