[Bug 981434] Re: unlzma and unxz should be specific binaries instead of links

[Jérôme]

Then a specific binary for decompression would save resources. The
common parts could be gathered in a shared library.

Most of the time, the compression binary would never be used.

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Title:
  unlzma and unxz should be specific binaries instead of links

Status in “xz-utils” package in Ubuntu:
  New

Bug description:
  Most users use only decompression tools and rarely compression tools.

  I think it would lower the load time (especially cold startup) as well
  as the argument parsing time if the uncompression tools would be
  specific binaries. Moreover, it could slightly decrease the memory
  consumption.

  For example, 'gunzip' is a specific binary which have only 2% of the size of the 'gzip' generic binary :
  -----
  j at dt-X64:~/tmp$ ls -l /bin/gzip /bin/gunzip 
  -rwxr-xr-x 1 root root  2251 févr.  9 01:26 /bin/gunzip
  -rwxr-xr-x 1 root root 92720 févr.  9 01:26 /bin/gzip
  j at dt-X64:~/tmp$
  -----

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: xz-lzma 5.1.1alpha+20110809-3
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
  Uname: Linux 3.2.0-23-generic x86_64
  ApportVersion: 2.0.1-0ubuntu2
  Architecture: amd64
  Date: Sat Apr 14 10:13:58 2012
  InstallationMedia: Xubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120328)
  PackageArchitecture: all
  SourcePackage: xz-utils
  UpgradeStatus: No upgrade log present (probably fresh install)

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