Your message dated Sun, 23 Dec 2018 10:04:07 +0000
with message-id <[email protected]>
and subject line Bug#871835: fixed in debootstrap 1.0.112
has caused the Debian Bug report #871835,
regarding speed up for debootstrap
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
871835: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=871835
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: debootstrap
Severity: normal
Tags: patch
I've wrote some patches, which speed up deboostrap a lot.
Changes are only made to /usr/share/debootstrap/functions, mostly in
the perl part, but also the number of lines that are proceeded by
perl are reduced via egrep.
Here are some time measures on a 4-core machine, the target directory
is inside a tmpfs and a local mirror in the same subnet is used.
old version 1.0.89
real 1m26.940s
user 1m24.180s
sys 0m2.420s
including the patches
real 0m39.481s
user 0m50.444s
sys 0m2.748s
If you have any questions concerning the patches, just ask me.
0001-optimize-code-make-debootstrap-faster.patch
Description: Binary data
0002-use-hash-instead-of-grep-for-each-line-we-read.patch
Description: Binary data
0003-we-can-use-elsif-because-the-line-can-t-match-both-p.patch
Description: Binary data
0004-There-s-no-need-to-print-the-dependencies-for-each-p.patch
Description: Binary data
0005-we-can-get-the-size-by-using-stat-instead-of-reading.patch
Description: Binary data
0006-do-not-read-all-lines-of-the-Packages-file-into-the-.patch
Description: Binary data
--
regards Thomas
--- End Message ---
--- Begin Message ---
Source: debootstrap
Source-Version: 1.0.112
We believe that the bug you reported is fixed in the latest version of
debootstrap, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to [email protected],
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Hideki Yamane <[email protected]> (supplier of updated debootstrap package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing [email protected])
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
Format: 1.8
Date: Sun, 23 Dec 2018 18:24:00 +0900
Source: debootstrap
Binary: debootstrap debootstrap-udeb
Architecture: source
Version: 1.0.112
Distribution: unstable
Urgency: low
Maintainer: Debian Install System Team <[email protected]>
Changed-By: Hideki Yamane <[email protected]>
Description:
debootstrap - Bootstrap a basic Debian system
debootstrap-udeb - Bootstrap the Debian system (udeb)
Closes: 871835
Changes:
debootstrap (1.0.112) unstable; urgency=low
.
[ Thomas Lange ]
* optimize code, make debootstrap faster (Closes: #871835)
- use hash instead of grep for each line we read
- we can use elsif, because the line can't match both patterns
- There's no need to print the dependencies for each package separately,
if when later do sort|uniq, so just collect all dependencies in a hash
and print them at the end
- do not read all lines of the Packages file into the perl scripts,
egrep is used for filtering only the lines we need to read, since egrep
is faster than perl, this save a lot of time
- speed up by using grep -P and setting LC_ALL=C
- automatic detect if grep support perl regex
- in this part, we only need the package name and priority this makes
another little speedup, since the perl part need less lines to parse
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