[Bug 1713219] Re: 'apt-mark showauto' and 'apt-cache show' is slow
** Description changed:
$ time apt-mark showauto >/dev/null
real 0m0,620s
user 0m0,557s
sys 0m0,052s
When I run the command first time, it is even much slower.
- I could do the job* in fraction of a time using awk in POSIX shell script
- (name it ./apt-mark-showauto.sh):
+ I could do the job* in fraction of a time using an AWK script
+ (name it ./apt-mark-showauto.awk):
- #!/bin/sh
- auto_file='/var/lib/apt/extended_states'
- awk '/^Package:/ {
- pkg=$2
- while (getline > 0 && $0) {
- if ($1 == "Auto-Installed:") {
- if ($2==1) print pkg
- break
- }
+ #!/usr/bin/awk -f
+ BEGIN{
+ file="/var/lib/apt/extended_states"
+ while ((getline < file) > 0) {
+ if ($0 ~ /^Package:/) {
+ pkg=$2
+ while ((getline < file) > 0 && $0) {
+ if ($1 == "Auto-Installed:") {
+ if ($2==1) print pkg
+ break
+ }
+ }
+ }
}
- }' "$auto_file"
+ }
- $ time ./apt-mark-showauto.sh >/dev/null
+ $ time ./apt-mark-showauto.awk >/dev/null
- real 0m0,005s
- user 0m0,002s
- sys 0m0,004s
+ real 0m0,004s
+ user 0m0,004s
+ sys 0m0,000s
- Tested in Ubuntu 20.04.
+ Tested in Ubuntu 20.04 and mawk 1.3.4 as AWK interpreter.
*) The script omits Architecture information, though. And should apt-
config be queried for the extended_states file path?
Similarly
apt-cache show
is slow. (It also shows whether a package is manually or automatically
installed.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: apt 1.0.1ubuntu2.17
ProcVersionSignature: Ubuntu 4.4.0-92.115~14.04.1-generic 4.4.76
Uname: Linux 4.4.0-92-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.25
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Aug 26 12:59:00 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-09-21 (1070 days ago)
InstallationMedia: Ubuntu-Studio 14.04.1 LTS "Trusty Tahr" - Release amd64
(20140722.1)
SourcePackage: apt
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.cron.daily.apt: [modified]
modified.conffile..etc.kernel.postinst.d.apt.auto.removal: [modified]
mtime.conffile..etc.cron.daily.apt: 2017-05-03T10:27:27.617839
mtime.conffile..etc.kernel.postinst.d.apt.auto.removal:
2017-06-01T14:39:39.236080
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https://bugs.launchpad.net/bugs/1713219
Title:
'apt-mark showauto' and 'apt-cache show' is slow
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[Bug 1713219] Re: 'apt-mark showauto' and 'apt-cache show' is slow
** Description changed:
$ time apt-mark showauto >/dev/null
- real 0m0.587s
- user 0m0.552s
- sys 0m0.016s
+ real 0m0,620s
+ user 0m0,557s
+ sys 0m0,052s
When I run the command first time, it is even much slower.
- I could do the job in fraction of a time using awk in POSIX shell
- script:
+ I could do the job* in fraction of a time using awk in POSIX shell script
+ (name it ./apt-mark-showauto.sh):
+ #!/bin/sh
auto_file='/var/lib/apt/extended_states'
- eval $(apt-config shell auto_file Dir::State::extended_states/f)
awk '/^Package:/ {
pkg=$2
- getline; arch=$2
- getline
- if($2==1) print pkg ":" arch
- }' "$auto_file" | CL_ALL=C sort -u
+ while (getline > 0 && $0) {
+ if ($1 == "Auto-Installed:") {
+ if ($2==1) print pkg
+ break
+ }
+ }
+ }' "$auto_file"
- real 0m0.019s
- user 0m0.008s
- sys 0m0.000s
+ $ time ./apt-mark-showauto.sh >/dev/null
- That prints architecture for every package and shows entries in slightly
- different order, though. And the file could be out of date showing
- packages that are not installed?!?
+ real 0m0,005s
+ user 0m0,002s
+ sys 0m0,004s
+
+ Tested in Ubuntu 20.04.
+
+ *) The script omits Architecture information, though. And should apt-
+ config be queried for the extended_states file path?
Similarly
- apt show
+ apt-cache show
is slow. (It also shows whether a package is manually or automatically
installed.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: apt 1.0.1ubuntu2.17
ProcVersionSignature: Ubuntu 4.4.0-92.115~14.04.1-generic 4.4.76
Uname: Linux 4.4.0-92-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.25
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Aug 26 12:59:00 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2014-09-21 (1070 days ago)
InstallationMedia: Ubuntu-Studio 14.04.1 LTS "Trusty Tahr" - Release amd64
(20140722.1)
SourcePackage: apt
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.cron.daily.apt: [modified]
modified.conffile..etc.kernel.postinst.d.apt.auto.removal: [modified]
mtime.conffile..etc.cron.daily.apt: 2017-05-03T10:27:27.617839
mtime.conffile..etc.kernel.postinst.d.apt.auto.removal:
2017-06-01T14:39:39.236080
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1713219
Title:
'apt-mark showauto' and 'apt-cache show' is slow
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1713219/+subscriptions
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