07-16-2013
There is of course some overhead but very little since, as you noted, it's smart enough to switch algorithms when faced with a file that compresses badly. It's much better than some older compressors which, worst case, could double the size of a file.
I have no idea where the 175% comes from, it makes no apparent sense either way you consider it.
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smart(8) smart(8)
NAME
smart - The Smart Package Manager
SYNOPSIS
smart command [options] [arguments]
DESCRIPTION
The Smart Package Manager project has the ambitious objective of creating smart and portable algorithms for solving adequately the problem
of managing software upgrading and installation. This tool works in all major distributions, and will bring notable advantages over native
tools currently in use (APT, APT-RPM, YUM, URPMI, etc).
Action commands
update
install
reinstall
upgrade
remove
check
fix
download
clean
Setup commands
channel
priority
mirror
flag
Query commands
search
query
info
stats
Run "smart command --help" for more information.
Options
--version
Show program's version number and exit
--config-file=FILE
Configuration file (default is <data-dir>/config)
--data-dir=DIR
Specifies the config file location - can take http, ftp urls and local file Data directory (default is /var/lib/smart/)
--log-level=LEVEL
Set the log level to level (debug, info, warning, error)
--gui Use the default graphic interface
--shell
Use the default shell interface
--interface=NAME
Use the given interface
--ignore-locks
Don't respect locking
-o OPT, --option=OPT
Set the option given by a name=value pair
Examples
smart install --help
smart install pkgname
smart --gui
smart --gui install pkgname
smart --shell
FILES
/etc/smart/
/var/lib/smart/
/usr/lib/smart/
/usr/lib/smart/plugins/
SEE ALSO
http://labix.org/smart
AUTHOR
Gustavo Niemeyer <gustavo@niemeyer.net>
Christoph Thiel 2006 Jun 16 smart(8)