[Bug 1461652] Re: dpkg-deb slow when building large packages
dank at kegel.com
Wed May 25 19:43:12 UTC 2016
When I backtrace it, it's spending a lot of time in
lzma_code () from /lib/x86_64-linux-gnu/liblzma.so.5
and children. strace shows lots of I/O going on. So it
appears to be compression overhead.
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dpkg-deb slow when building large packages
Status in dpkg package in Ubuntu:
Building a 100 megabyte -dbg package (don't laugh, debugging symbols can get quite large)
takes an extra five to ten minutes in dpkg-deb. ps shows e.g.
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
dank 6207 99.6 0.7 114984 95736 pts/31 R+ 11:11 5:00 dpkg-deb --build debian/foo-dbg ..
This is nothing new, but it is always irritating.
DistroRelease: Ubuntu 14.04
Package: dpkg 1.17.5ubuntu5.4
ProcVersionSignature: Ubuntu 3.13.0-53.89-generic 3.13.11-ckt19
Uname: Linux 3.13.0-53-generic x86_64
Date: Wed Jun 3 11:19:12 2015
UpgradeStatus: No upgrade log present (probably fresh install)
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