[Bug 1552764] Re: Eclipse and SWT are very slow/hang on a fresh 16.04 install (gtk3/swt issue)

[Franck]

This is definitely a problem with SWT and the version of GTK3 that ships with 16.04.
the problem also arises with for example Gantproject (https://www.ganttproject.biz/download) or Digdash Studio (proprietary BI tool).

Exporting SWT_GTK3=0 works around the issue, but most SWT applications
will fail by default on Xenial.

** Summary changed:

- Eclipse is very slow/hangs on a fresh 16.04 install (gtk/swt issue?)
+ Eclipse and SWT are very slow/hang on a fresh 16.04 install (gtk3/swt issue)

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Title:
  Eclipse and SWT are very slow/hang on a fresh 16.04 install (gtk3/swt
  issue)

Status in java-common package in Ubuntu:
  Confirmed
Status in openjdk package in Ubuntu:
  Confirmed
Status in swt-gtk package in Ubuntu:
  Confirmed

Bug description:
  I installed a fresh Ubuntu 16.04 64 bit from nightly build
  (2016-03-02).

  Eclipse Mars.2 (4.5.2) is often very slow / hangs, especially on start
  of actions (searching projects, importing them, search for updates,
  install plugins etc.

  Things I tried:
    * openjdk8 /oracle java 8
    * OS / CS nvidia driver
    * unity / gnome (metacity and compizz)
    * fresh workspace

  jvisualvm  shows that much cpu time is consumed by
  rg.eclipse.swt.internal.gtk.OS._g_main_context_iteration[native] ...

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