[Libreoffice-bugs] [Bug 119724] New: MacOS: Large delay before the red spell checker lines show up after pasting the same content multiple times. Lots of time spend in Scheduler::ProcessTaskScheduling()

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=119724

            Bug ID: 119724
           Summary: MacOS: Large delay before the red spell checker lines
                    show up after pasting the same content multiple times.
                    Lots of time spend in
                    Scheduler::ProcessTaskScheduling()
           Product: LibreOffice
           Version: 6.2.0.0.alpha0+ Master
          Hardware: All
                OS: Mac OS X (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: telesto at surfxs.nl

Description:
MacOS: Large delay before the red spell checker lines show up after pasting the
same content multiple times. Lots of time spend in
Scheduler::ProcessTaskScheduling() 

Steps to Reproduce:
1. Open the attached file
2. Use Instruments Time Profiler (not needed, but shows the
ProcessTaskScheduling)
2. Enable the spell checker (ideally to non-english) (it's more the visual
impact; not needed for reproducing)
2. CMD+A + CMD +C
3. Hold CMD+V for a while (around 30 pages).. Notice that the LibO keeps
processing, when releasing CMD+V (which it didn't do before). And it takes a
long time before the spell checker finishes

Actual Results:
LibO keeps processing 20 seconds after releasing the CMD+V

Expected Results:
CPU usage should drop within 2 seconds or so


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 6.2.0.0.alpha0+
Build ID: 7cb6dc2652ce7e2e7d9ec7464bb1eed0d93306d7
CPU threads: 4; OS: Mac OS X 10.12.6; UI render: default; 
TinderBox: MacOSX-x86_64 at 49-TDF, Branch:master, Time: 2018-08-29_09:02:27
Locale: nl-NL (nl_NL.UTF-8); Calc: threaded

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