[Libreoffice-bugs] [Bug 112978] New: CPU usage for selecting text has increased since 5.1

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=112978

            Bug ID: 112978
           Summary: CPU usage for selecting text has increased since 5.1
           Product: LibreOffice
           Version: 5.1.0.3 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:
CPU usage for selecting text has increased since 5.1

Steps to Reproduce:

1. Open Writer
2. Disable Automatic spell checking (SHIFT+F7)Tools -> Spell Checking
3. Open attachment 134007 [details]
4. Open a CPU monitoring tool
5. Press CTRL+A -> Notice a CPU (25%) spike for around 5 seconds

Actual Results:  
CPU usage is spiking for around 5 seconds with LibO6. Bit less in older
versions. 

Expected Results:
Shouldn't happen, as it didn't happen before. Something similar to LibO5.0.
Around 7% for 2 seconds  


Reproducible: Always

User Profile Reset: No

Additional Info:
Found in
Version: 6.0.0.0.alpha0+
Build ID: c5a93cad149618bbd43632f1660a558c34bdbf7e
CPU threads: 4; OS: Windows 6.3; UI render: default; 
TinderBox: Win-x86 at 42, Branch:master, Time: 2017-10-07_01:04:25
Locale: nl-NL (nl_NL); Calc: CL

and in LibO5.1.0.0


User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101
Firefox/52.0

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