Eclipse is extremely laggy (almost unusable) after upgrading to ubuntu 16.04
<p>After upgrading ubuntu to 16.04 eclipse is extremely problematic, almost unusable.</p>

<p>Problems are:</p>

<ul>
<li>Menu is loading, but not fully functional;</li>
<li>Sub-menies are non-functional;</li>
<li>Deleting project causes hanging and endless progress bar showing;</li>
<li>Updating, installing new software, ... non-functional;</li>
<li>After opening preferences menu on the right stays the same regardless
of which option is selected in preferences sub-menu;</li>
<li>Cannot connect to the update sites;</li>
<li>and so on ...</li>
</ul>

<p>In terminal is clearly displayed info about bug for pixman_region32:</p>

<pre><code>*** BUG ***
In pixman_region32_init_rect: Invalid rectangle passed
Set a breakpoint on '_pixman_log_error' to debug
</code></pre>

<p>What is the solution (beside the fact that bug is reported)?</p>