Bug 38809

Summary: Analyse/Improve Structure and Cache efficiency with DHAT/valgrind
Product: LibreOffice Reporter: Björn Michaelsen <bjoern.michaelsen>
Component: LibreOfficeAssignee: Not Assigned <libreoffice-bugs>
Status: NEW ---    
Severity: normal CC: michael.meeks, mkbosmans
Priority: medium    
Version: unspecified   
Hardware: Other   
OS: All   
Whiteboard: reviewed:2023
Crash report or crash signature: Regression By:
Bug Depends on:    
Bug Blocks: 143781    

Description Björn Michaelsen 2011-06-30 06:54:15 UTC 
Improve Structure / Cache efficiency

Background: there is a new (experimental) valgrind tool called 'DHAT, a dynamic heap analysis tool'. It generates output a little like this. The data is rather hard to interpret, and has some false positives (eg. the opendir hits), but can point to large chunks of memory that are allocated written to, but then never read from, or identify holes in frequently used structures, and so on. It would be great to do further analysis on the data, discuss it on the list, and then patch the various classes / structures / calls in most need.

Skills: building, C++ hacking, C++ ABI understanding, patience.
Comment 1 Florian Reisinger 2012-05-18 08:56:30 UTC 
Deteted "Easyhack" from summary
Comment 2 Björn Michaelsen 2013-10-04 18:47:49 UTC 
adding LibreOffice developer list as CC to unresolved EasyHacks for better visibility.

see e.g. http://nabble.documentfoundation.org/minutes-of-ESC-call-td4076214.html for details
Comment 3 Robinson Tryon (qubit) 2015-12-14 05:03:39 UTC Comment hidden (obsolete)
Comment 4 Robinson Tryon (qubit) 2016-02-18 14:52:32 UTC Comment hidden (obsolete)
Comment 5 Hossein 2023-12-27 13:53:29 UTC 
Re-evaluating the EasyHack in 2023

It will be useful to do some analysis with DHAT/valgrind and then improve the code, but as the area and the scope of the task is not very clear, I remove the EasyHack tag.