[Libreoffice-bugs] [Bug 118991] New: EDITING. 100% CPU usage after a few minutes with certain documents.

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=118991

            Bug ID: 118991
           Summary: EDITING. 100% CPU usage after a few minutes with
                    certain documents.
           Product: LibreOffice
           Version: 6.0.5.2 release
          Hardware: x86-64 (AMD64)
                OS: Mac OS X (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Writer
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: laurens at norbit.no

Since at least LO 6.0 some documents cause 100% CPU usage when they are open
for a few minutes.

After scrolling through the document from top to bottom reduces the CPU usage
to normal levels for a few minutes, but then the CPU gets back to 100%.

This is a deal-breaker for using LO on my laptop

OS: macOS High Sierra. 

Profile: I recently made a new profile - no change

Document: happens in a work document, so I cannot share. It is quite a complex
document (quite a few included PNG files) - 6MB total doc. size, about 77 pages

I have the process sampled - include an extract here. Seems like the
AquaSalTimer takes a lot of time?

Sampling process 1307 for 3 seconds with 1 millisecond of run time between
samples
Sampling completed, processing symbols...
Analysis of sampling soffice (pid 1307) every 1 millisecond
Process:         soffice [1307]
Path:            /Applications/LibreOffice.app/Contents/MacOS/soffice
Load Address:    0x109f9c000
Identifier:      org.libreoffice.script
Version:         6.0.5002 (6.0.5002)
Code Type:       X86-64
Parent Process:  ??? [1]

Date/Time:       2018-07-30 08:58:55.994 +0200
Launch Time:     2018-07-30 08:50:39.223 +0200
OS Version:      Mac OS X 10.13.6 (17G2208)
Report Version:  7
Analysis Tool:   /usr/bin/sample

Physical footprint:         355.7M
Physical footprint (peak):  482.8M
----

Call graph:
    2577 Thread_28540   DispatchQueue_1: com.apple.main-thread  (serial)
    + 2577 start  (in libdyld.dylib) + 1  [0x7fff686b8015]
    +   2577 main  (in soffice) + 16  [0x109f9cf50]
    +     2577 soffice_main  (in libsofficeapp.dylib) + 230  [0x10a050c36]
    +       2577 SVMain()  (in libvcllo.dylib) + 40  [0x10d88c348]
    +         2577 ImplSVMainHook(int*)  (in libvcllo.dylib) + 353 
[0x10d8f8ef1]
    +           2577 NSApplicationMain  (in AppKit) + 804  [0x7fff3dd03a72]
    +             2577 -[NSApplication run]  (in AppKit) + 812 
[0x7fff3dd348b5]
    +               2577 -[VCL_NSApplication sendEvent:]  (in libvcllo.dylib) +
79  [0x10d952b4f]
    +                 2577 AquaSalInstance::handleAppDefinedEvent(NSEvent*) 
(in libvcllo.dylib) + 159  [0x10d8f9caf]
    +                   2577 ImplSVMain()  (in libvcllo.dylib) + 91 
[0x10d88b73b]
    +                     2577 desktop::Desktop::Main()  (in
libsofficeapp.dylib) + 2764  [0x10a02062c]
    +                       2577 Application::Execute()  (in libvcllo.dylib) +
256  [0x10d886150]
    +                         2575 ImplYield(bool, bool)  (in libvcllo.dylib) +
73  [0x10d886249]
    +                         ! 1825 AquaSalInstance::DoYield(bool, bool)  (in
libvcllo.dylib) + 720  [0x10d8fa510]
    +                         ! : 1816 AquaSalTimer::callTimerCallback()  (in
libvcllo.dylib) + 64  [0x10d8fd800]
    +                         ! : | 1390 Scheduler::ProcessTaskScheduling() 
(in libvcllo.dylib) + 568  [0x10d877d78]
    +                         ! : | + 1324
sw::DocumentTimerManager::DoIdleJobs(Timer*)  (in libswlo.dylib) + 535 
[0x18c7e72a7]
    +                         ! : | + ! 1166 SwViewShell::LayoutIdle()  (in
libswlo.dylib) + 338  [0x18cc4d5d2]
    +                         ! : | + ! : 571
SwLayIdle::SwLayIdle(SwRootFrame*, SwViewShellImp*)  (in libswlo.dylib) + 129 
[0x18c977be1]
    +                         ! : | + ! : | 333
SwLayIdle::DoIdleJob(SwLayIdle::IdleJobType, bool)  (in libswlo.dylib) + 216 
[0x18c977888]
    +                         ! : | + ! : | + 177
SwContentFrame::ImplGetNextContentFrame(bool) const  (in libswlo.dylib) + 171 
[0x18c94c55b]
    +                         ! : | + ! : | + ! 52 SwFrame::IsContentFrame()
const  (in libswlo.dylib) + 54  [0x18c6ca466]
    +                         ! : | + ! : | + ! : 29
o3tl::typed_flags<SwFrameType>::Wrap operator&<SwFrameType>(SwFrameType,
o3tl::typed_flags<SwFrameType>::Wrap)  (in libswlo.dylib) + 53,37,... 
[0x18c6cc265,0x18c6cc255,...]
    +                         ! : | + ! : | + ! : 17
o3tl::typed_flags<SwFrameType>::Wrap operator&<SwFrameType>(SwFrameType,
o3tl::typed_flags<SwFrameType>::Wrap)  (in libswlo.dylib) + 50  [0x18c6cc262]
    +                         ! : | + ! : | + ! : | 9
o3tl::is_typed_flags<SwFrameType, 64511>::Wrap::Wrap(int)  (in libswlo.dylib) +
7,1,...  [0x18c6cc317,0x18c6cc311,...]
    +                         ! : | + ! : | + ! : | 8
o3tl::is_typed_flags<SwFrameType, 64511>::Wrap::Wrap(int)  (in libswlo.dylib) +
4  [0x18c6cc304]
    +                         ! : | + ! : | + ! : 5
o3tl::typed_flags<SwFrameType>::Wrap operator&<SwFrameType>(SwFrameType,
o3tl::typed_flags<SwFrameType>::Wrap)  (in libswlo.dylib) + 37  [0x18c6cc255]
    +                         ! : | + ! : | + ! : | 5
o3tl::is_typed_flags<SwFrameType, 64511>::Wrap::operator int() const  (in
libswlo.dylib) + 4,1,...  [0x18c6cc2f4,0x18c6cc2f1,...]
    +                         ! : | + ! : | + ! : 1
o3tl::is_typed_flags<SwFrameType, 64511>::Wrap::Wrap(int)  (in libswlo.dylib) +
5  [0x18c6cc305]
    +                         ! : | + ! : | + ! 48 SwFrame::IsContentFrame()
const  (in libswlo.dylib) + 45  [0x18c6ca45d]

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