[Libreoffice-bugs] [Bug 108513] New: EDITING: performance regression for changing formatting in a large document

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=108513

            Bug ID: 108513
           Summary: EDITING: performance regression for changing
                    formatting in a large document
           Product: LibreOffice
           Version: 5.0.0.5 release
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: telesto at surfxs.nl

Description:
Performance regression for changing formatting in a large document. However the
same issue seems also to occur at file opening. 

Steps to Reproduce:
Option 1 (corresponding with the summary)
1. Open the attached file
2. Select All and apply formatting. Monitor CPU usage

Option 2
1. Download the attached file
2. Make a few copy's of it (4 or 5)
3. Disable Automatic spell checking
3. Open all of them at once, at monitor how long it takes until CPU utilization
drops to (nearly zero)

Actual Results:  
CPU is maxed out for 7 seconds with Master, but with LibO4.4.6.3 it's only a 2
seconds

Expected Results:
CPU behavior similar to LibO 4.4.6.3 


Reproducible: Always

User Profile Reset: No

Additional Info:
Found in
Version: 5.5.0.0.alpha0+
Build ID: 076ed447f694239d5c67adee528ea6e471d909ff
CPU threads: 4; OS: Windows 6.19; UI render: default; 
TinderBox: Win-x86 at 42, Branch:master, Time: 2017-06-09_23:54:20
Locale: nl-NL (nl_NL); Calc: CL

and in
Version: 5.1.0.3
Build ID: 5e3e00a007d9b3b6efb6797a8b8e57b51ab1f737
CPU Threads: 4; OS Version: Windows 6.2; UI Render: default; 
Locale: en-US (nl_NL)

a shorter spike in 
Version: 5.0.0.5
Build ID: 1b1a90865e348b492231e1c451437d7a15bb262b
Locale: nl-NL (nl_NL)

No spike in
Versie: 4.4.6.3 
Build ID: e8938fd3328e95dcf59dd64e7facd2c7d67c704d
Locale: nl_NL


User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:45.0) Gecko/20100101
Firefox/45.0

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