https://bugs.freedesktop.org/show_bug.cgi?id=49848
Bug #: 49848
Summary: FILEOPEN: Worse-than Linear Performance Degradation
Opening Change-Tracked ODTs
Classification: Unclassified
Product: LibreOffice
Version: LibO 3.5.3 release
Platform: Other
OS/Version: All
Status: UNCONFIRMED
Status Whiteboard: BSA
Severity: normal
Priority: medium
Component: Writer
AssignedTo: libreoffice-bugs@lists.freedesktop.org
ReportedBy: dennis.hamil...@acm.org
Created attachment 61518
--> https://bugs.freedesktop.org/attachment.cgi?id=61518
Spreadsheet of Timing Tests showing degradation with document growth
Problem description:
SUMMARY
There is a worse-than linear decrease in document opening and
saving performance when additional change tracking is added in
a progression of draft changes to an original document.
At some point, the degradation is so bad that an user is
likely to assume that the software has hung and is failing to
open the document. On slower machines than the one the
documents were created on, this delay can be hours, not just
too many minutes.
TEST DOCUMENTS
There are five test documents, WD03a, WD03b, WD03c, WD04a, and
WD03x.
They are all available here:
<http://tools.oasis-open.org/version-control/svn/oic/TestSuite/trunk/odf12/ChangeTrackingResilience/>.
If you want to know what WD03c is supposed to look like, there
is a PDF available here:
<http://www.oasis-open.org/apps/org/workgroup/office/document.php?document_id=45946>.
It is a large file, but it opens quickly in Acrobat.
To know what the 223 tracked changes are, you can also check
Section 2 of the smaller file available here:
<http://www.oasis-open.org/apps/org/workgroup/office/document.php?document_id=45936>.
It is an ODF Text (.ODT) file.
DEMONSTRATION OF THE WORSE-THAN LINEAR DEGRADATION
The defect is demonstrated by timed opening of 4 documents
that have an increasing number of tracked changes.
* WD03a is 476kB and has 169 changes. It opens in around 15
seconds on a fast system.
* WD03b is 746kB and the number of changes is raised to 207.
It takes a few minutes to open the document (roughly 16x as
long as for WD03a on a fast system).
* WD03c is 1,132kB and it has 223 changes. It takes roughtly
4x more than WD03b. On a slower Windows XP SP3 x86 system,
it takes more than an hour to open the document.
* WD04a is 1,343kB although it has no more tracked changes
and was only updated enough to start a new working draft
set. Yet it is 200kb larger and it takes almost double
the time over that for WD03c. On the slowest system
used, it takes 2.5 hours.
THE SPREADSHEET (attached) will provide timing
statistics and the the different configurations and software releases on which
measurements were captured.
--
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.
_______________________________________________
Libreoffice-bugs mailing list
Libreoffice-bugs@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/libreoffice-bugs
