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[Bug 1227710] [NEW] unity-panel-service consumes 100% of my CPU for 8 seconds to while waiting for a global menu to open

 

Public bug reported:

When opening a libreoffice calc menu nothing happens for 8 seconds.
Using "top" one can observe that unity-panel-service is pegging one of
my CPUs at 100%.   This is 100% repeatable.  Just start libreoffice,
open the menu.  Opening the menu thereafter is often faster. But from a
clean start of libreoffice one can always trigger this issue.

Attached is a video showing the delay in opening a menu.  I'm running in
a 2.5 Ghz i5 CPU, so 8 seconds equates to 20 billion clock cycles to
open a menu.

** Affects: unity (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "video of the bug"
   https://bugs.launchpad.net/bugs/1227710/+attachment/3829274/+files/out.ogv

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https://bugs.launchpad.net/bugs/1227710

Title:
  unity-panel-service consumes 100% of my CPU for 8 seconds to while
  waiting for a global menu to open

Status in “unity” package in Ubuntu:
  New

Bug description:
  When opening a libreoffice calc menu nothing happens for 8 seconds.
  Using "top" one can observe that unity-panel-service is pegging one of
  my CPUs at 100%.   This is 100% repeatable.  Just start libreoffice,
  open the menu.  Opening the menu thereafter is often faster. But from
  a clean start of libreoffice one can always trigger this issue.

  Attached is a video showing the delay in opening a menu.  I'm running
  in a 2.5 Ghz i5 CPU, so 8 seconds equates to 20 billion clock cycles
  to open a menu.

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