Bug 1016308

Summary:	rcs "co" command is very slow
Product:	[Fedora] Fedora	Reporter:	Andrew J. Schorr <aschorr>
Component:	rcs	Assignee:	Honza Horak <hhorak>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	19	CC:	hhorak
Target Milestone:	---	Keywords:	Patch
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	rcs-5.9.2-1.fc20	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:
Clones:	1036527 (view as bug list)		Environment:
Last Closed:	2014-01-03 08:33:31 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1036527

Description Andrew J. Schorr 2013-10-07 20:49:19 UTC

Description of problem: There seems to be a performance regression in newer versions of RCS.  I built RCS 5.7 and 5.9.1 on a Fedora 19 x86_64 system.  Running on the same RCS data, I timed the new and old versions for
the command "co -p1.1 <filename>".  With 5.9.1 (and 5.9), it takes over 1 minute.
With 5.7, it takes less than one second.  This is on a file with 3585
revisions in the RCS history.

This performance regression is present in versions 5.8.1 and 5.8.2 as well.


Version-Release number of selected component (if applicable): rcs-5.9.0-1.fc19.x86_64


How reproducible: Run "co -p1.1 <filename>" on a file with many many revisions.


Steps to Reproduce:
1. time co -p1.1 <filename> for a file with many revisions.
2.
3.

Actual results: It should take less than 1 second.


Expected results: It takes more than a minute.


Additional info:

Comment 1 Andrew J. Schorr 2013-10-07 21:49:16 UTC

FYI, I opened an upstream bug here:

https://savannah.gnu.org/bugs/index.php?40200

Comment 2 Honza Horak 2013-11-04 16:06:39 UTC

Thanks for cooperate with upstream. FTR, this seems to be the fix:
http://git.savannah.gnu.org/cgit/rcs.git/commit/?h=p&id=e91adb0

...but there can still be some performance difference between 5.7 and current code -- mostly due to architectural changes [1]

[1] https://savannah.gnu.org/bugs/index.php?40200

Comment 3 Fedora Update System 2013-11-29 14:32:39 UTC

rcs-5.9.2-1.fc20 has been submitted as an update for Fedora 20.
https://admin.fedoraproject.org/updates/rcs-5.9.2-1.fc20

Comment 4 Fedora Update System 2013-11-29 14:41:06 UTC

rcs-5.9.2-1.fc19 has been submitted as an update for Fedora 19.
https://admin.fedoraproject.org/updates/rcs-5.9.2-1.fc19

Comment 5 Fedora Update System 2013-11-29 16:04:59 UTC

Package rcs-5.9.2-1.fc20:
* should fix your issue,
* was pushed to the Fedora 20 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing rcs-5.9.2-1.fc20'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2013-22406/rcs-5.9.2-1.fc20
then log in and leave karma (feedback).

Comment 6 Fedora Update System 2014-01-03 08:33:31 UTC

rcs-5.9.2-1.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Fedora Update System 2014-01-03 08:44:33 UTC

rcs-5.9.2-1.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.