Bug 113971 - Exceptional high CPU usage when typing between two images
Summary: Exceptional high CPU usage when typing between two images
Status: RESOLVED DUPLICATE of bug 112568
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
Version:
(earliest affected)
4.2.0.4 release
Hardware: All All
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords: perf, regression
Depends on:
Blocks: Performance CPU-AT-100%
  Show dependency tree / graph
 
Reported: 2017-11-21 14:03 UTC by Telesto
Modified: 2024-04-25 06:39 UTC (History)
1 user (show)

See Also:
Crash report or crash signature:

Attachments
Example file (639.44 KB, application/vnd.oasis.opendocument.text)
2017-11-21 14:03 UTC, Telesto 		Details
Callgrind output from master (6.29 MB, application/x-xz)
2017-11-21 14:36 UTC, Buovjaga 		Details
View All Add an attachment (proposed patch, testcase, etc.)

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Description Telesto 2017-11-21 14:03:22 UTC 
Description:
Exceptional high CPU usage when typing between to images 

Steps to Reproduce:
1. Open the attached file
2. Start typing (or holding a key) while monitoring CPU usage

Actual Results:  
Pretty high CPU spike. Worst case 60%. Normal 30%

Expected Results:
Something like 4.1. So about 5% CPU usage


Reproducible: Always


User Profile Reset: No



Additional Info:
Found in
Version: 6.0.0.0.alpha1+
Build ID: b3f1d199a72ce87cb65ddaeac922564f57da6a4d
CPU threads: 4; OS: Windows 6.3; UI render: default; 
TinderBox: Win-x86@42, Branch:master, Time: 2017-11-06_00:10:53
Locale: nl-NL (nl_NL); Calc: CL

and in
Versie: 4.2.0.4 
Build ID: 05dceb5d363845f2cf968344d7adab8dcfb2ba71

but not in
Versie: 4.1.0.4 


User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
Comment 1 Telesto 2017-11-21 14:03:41 UTC 
Created attachment 137892 [details]
Example file
Comment 2 Buovjaga 2017-11-21 14:36:27 UTC 
Created attachment 137894 [details]
Callgrind output from master

Repro. Was not related to auto spell checking.

Possibly same as bug 112568?

Arch Linux 64-bit
Version: 6.0.0.0.alpha1+
Build ID: 121303615054568c204def97872343d2014af4a0
CPU threads: 8; OS: Linux 4.13; UI render: default; VCL: kde4; 
Locale: fi-FI (fi_FI.UTF-8); Calc: group
Built on November 17th 2017
Comment 3 Telesto 2017-11-21 14:57:01 UTC 
(In reply to Buovjaga from comment #2)
> Created attachment 137894 [details]
> Callgrind output from master
> 
> Repro. Was not related to auto spell checking.
> 
> Possibly same as bug 112568?
> 
> Arch Linux 64-bit
> Version: 6.0.0.0.alpha1+
> Build ID: 121303615054568c204def97872343d2014af4a0
> CPU threads: 8; OS: Linux 4.13; UI render: default; VCL: kde4; 
> Locale: fi-FI (fi_FI.UTF-8); Calc: group
> Built on November 17th 2017

It was indeed looking into bug 112568 when I found this, and it could be the same issue (it would surprise me). However not 100% sure. The letters appear nearly instantaneous; some lag, but not that obvious. And both reports are related to LibO5.4
Comment 4 Telesto 2017-11-21 15:12:31 UTC 
The Callgrind trace seems to point to bug 86675 (BitmapScaleSuper)

I attempted a bibisect with 4.1max, but nearly every version I did try kept crashing..
Comment 5 Telesto 2017-11-23 16:46:00 UTC 
@Buovjaga
This is dupe of bug 112568 (or the other way around)
Comment 6 Buovjaga 2017-11-23 17:14:58 UTC 
Let's dupe to the older and I will ref my trace there.

*** This bug has been marked as a duplicate of bug 112568 ***