06-26-2006
I highly doubt anyone knows this answer off the top of their head. Why don't you open top or topas in another window and monitor the gunzip command to see for yourself? The following is output from running topas. This isn't the best way to measure but since noone has replied I thought I would give you a place to start.
Topas Monitor for host: xsa00831
Mon Jun 26 10:31:16 2006 Interval: 2
Kernel 1.5 |# |
User 0.4 |# |
Wait 0.0 | |
Idle 98.1 |############################|
Network KBPS I-Pack O-Pack KB-In KB-Out
en0 0.7 3.5 2.0 0.2 0.5
en3 0.4 4.0 1.0 0.3 0.1
en2 0.1 3.0 0.0 0.1 0.0
lo0 0.1 1.0 1.0 0.0 0.0
Disk Busy% KBPS TPS KB-Read KB-Writ
hdisk2 0.0 0.0 0.0 0.0 0.0
hdisk0 0.0 0.0 0.0 0.0 0.0
hdisk1 0.0 0.0 0.0 0.0 0.0
hdisk98 0.0 0.0 0.0 0.0 0.0
hdisk106 0.0 0.0 0.0 0.0 0.0
hdisk113 0.0 0.0 0.0 0.0 0.0
hdisk37 0.0 0.0 0.0 0.0 0.0
hdisk102 0.0 0.0 0.0 0.0 0.0
hdisk103 0.0 0.0 0.0 0.0 0.0
hdisk120 0.0 0.0 0.0 0.0 0.0
hdisk122 0.0 0.0 0.0 0.0 0.0
hdisk104 0.0 0.0 0.0 0.0 0.0
hdisk119 0.0 0.0 0.0 0.0 0.0
hdisk108 0.0 0.0 0.0 0.0 0.0
hdisk101 0.0 0.0 0.0 0.0 0.0
hdisk99 0.0 0.0 0.0 0.0 0.0
hdisk110 0.0 0.0 0.0 0.0 0.0
hdisk111 0.0 0.0 0.0 0.0 0.0
hdisk114 0.0 0.0 0.0 0.0 0.0
hdisk109 0.0 0.0 0.0 0.0 0.0
Name PID CPU% PgSp Owner
batchman 43242 0.1 1.4 maestro
pdosaudi 39476 0.1 3.1 root
mstragen 49096 0.1 1.9 root
getty 24944 0.1 0.5 root
iravcol 21708 0.1 3.0 root
mstragen 36460 0.1 1.0 root
syncd 14110 0.0 0.6 root
irmultic 26840 0.0 5.4 root
tecad_lo 34066 0.0 1.4 root
IBM.Host 27870 0.0 1.5 root
dtgreet 19698 0.0 1.7 root
pdosd 38216 0.0 8.7 root
irmultic 23024 0.0 2.6 root
hatsd 26188 0.0 6.3 root
dsmc 27166 0.0 13.3 root
hats_rs2 35094 0.0 1.0 root
maragent 47302 0.0 9.0 root
gil 10320 0.0 0.1 root
hats_nim 35616 0.0 1.0 root
hats_nim 32552 0.0 1.0 root
IBM.CSMA 30724 0.0 1.7 root
clstrmgr 37686 0.0 2.4 root
PD2 16028 0.0 0.0 root
irnetrtr 25824 0.0 18.1 root
clcomd 34334 0.0 1.3 root
EVENTS/QUEUES FILE/TTY
Cswitch 510 Readch 1476.5K
Syscall 4393 Writech 280
Reads 394 Rawin 0
Writes 1 Ttyout 231
Forks 0 Igets 0
Execs 0 Namei 5
Runqueue 0.0 Dirblk 0
Waitqueue 0.0
PAGING MEMORY
Faults 0 Real,MB 8191
Steals 0 % Comp 8.2
PgspIn 0 % Noncomp 8.9
PgspOut 0 % Client 0.5
PageIn 0
PageOut 16 PAGING SPACE
Sios 16 Size,MB 9216
% Used 0.5
NFS (calls/sec) % Free 99.4
ServerV2 0
ClientV2 0 Press:
ServerV3 0 "h" for help
ClientV3 0 "q" to quit
-X
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GZIP(1) BSD General Commands Manual GZIP(1)
NAME
gzip -- compression/decompression tool using Lempel-Ziv coding (LZ77)
SYNOPSIS
gzip [-cdfhkLlNnqrtVv] [-S suffix] file [file [...]]
gunzip [-cfhkLNqrtVv] [-S suffix] file [file [...]]
zcat [-fhV] file [file [...]]
DESCRIPTION
The gzip program compresses and decompresses files using Lempel-Ziv coding (LZ77). If no files are specified, gzip will compress from stan-
dard input, or decompress to standard output. When in compression mode, each file will be replaced with another file with the suffix, set by
the -S suffix option, added, if possible.
In decompression mode, each file will be checked for existence, as will the file with the suffix added. Each file argument must contain a
separate complete archive; when multiple files are indicated, each is decompressed in turn.
In the case of gzcat the resulting data is then concatenated in the manner of cat(1).
If invoked as gunzip then the -d option is enabled. If invoked as zcat or gzcat then both the -c and -d options are enabled.
This version of gzip is also capable of decompressing files compressed using compress(1), bzip2(1), or xz(1).
OPTIONS
The following options are available:
-1, --fast
-2, -3, -4, -5, -6, -7, -8
-9, --best These options change the compression level used, with the -1 option being the fastest, with less compression, and the -9
option being the slowest, with optimal compression. The default compression level is 6.
-c, --stdout, --to-stdout
This option specifies that output will go to the standard output stream, leaving files intact.
-d, --decompress, --uncompress
This option selects decompression rather than compression.
-f, --force This option turns on force mode. This allows files with multiple links, symbolic links to regular files, overwriting of
pre-existing files, reading from or writing to a terminal, and when combined with the -c option, allowing non-compressed
data to pass through unchanged.
-h, --help This option prints a usage summary and exits.
-k, --keep Keep (do not delete) input files during compression or decompression.
-L, --license This option prints gzip license.
-l, --list This option displays information about the file's compressed and uncompressed size, ratio, uncompressed name. With the -v
option, it also displays the compression method, CRC, date and time embedded in the file.
-N, --name This option causes the stored filename in the input file to be used as the output file.
-n, --no-name This option stops the filename and timestamp from being stored in the output file.
-q, --quiet With this option, no warnings or errors are printed.
-r, --recursive This option is used to gzip the files in a directory tree individually, using the fts(3) library.
-S suffix, --suffix suffix
This option changes the default suffix from .gz to suffix.
-t, --test This option will test compressed files for integrity.
-V, --version This option prints the version of the gzip program.
-v, --verbose This option turns on verbose mode, which prints the compression ratio for each file compressed.
ENVIRONMENT
If the environment variable GZIP is set, it is parsed as a white-space separated list of options handled before any options on the command
line. Options on the command line will override anything in GZIP.
EXIT STATUS
The gzip utility exits0 on success, 1 on errors, and 2 if a warning occurs.
SEE ALSO
bzip2(1), compress(1), xz(1), fts(3), zlib(3)
HISTORY
The gzip program was originally written by Jean-loup Gailly, licensed under the GNU Public Licence. Matthew R. Green wrote a simple front
end for NetBSD 1.3 distribution media, based on the freely re-distributable zlib library. It was enhanced to be mostly feature-compatible
with the original GNU gzip program for NetBSD 2.0.
This implementation of gzip was ported based on the NetBSD gzip, and first appeared in FreeBSD 7.0.
AUTHORS
This implementation of gzip was written by Matthew R. Green <mrg@eterna.com.au> with unpack support written by Xin LI <delphij@FreeBSD.org>.
BUGS
According to RFC 1952, the recorded file size is stored in a 32-bit integer, therefore, it cannot represent files larger than 4GB. This lim-
itation also applies to -l option of gzip utility.
BSD
October 26, 2015 BSD