[Bugs] #4889 Sugar NORM: virtual memory leak in background control panel

[Sugar Labs Bugs]

#4889: virtual memory leak in background control panel
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  Reporter:  quozl   |            Owner:
      Type:  defect  |           Status:  new
  Priority:  Normal  |        Milestone:  Unspecified
 Component:  Sugar   |          Version:  Unspecified
  Severity:  Minor   |       Resolution:
  Keywords:          |  Distribution/OS:  OLPC
Bug Status:  New     |
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Comment (by quozl):

 * thanks, that's interesting.  Looking forward to some more detailed
 tests.  How well does the Pympler summary correlate to the VmSize change?
  * some repeated mouse click testing, monitoring VmSize while simulating
 mouse clicks;
   * Moon activity orientation button is unaffected (switches between
 southern and northern hemisphere view),
   * Moon activity grid button is unaffected (overlays a grid or not),
   * Moon activity tool bar is affected a tiny bit,
   * StopWatch activity tool bar sharing icon is affected a tiny bit,
  * an F1 F3 key press loop shows only 21 kbyte/sec leak on XO-1, not the
 85 kbyte/sec leak on XO-4 found earlier, so either architecture or the
 number and complexity of activity icons matters,
  * for the record, some earlier discussion of this problem is in
 [https://github.com/sugarlabs/sugar/pull/520 pr 520], with an analysis of
 potential relevant code by
 [https://github.com/sugarlabs/sugar/pull/520#issuecomment-145916968
 Gonzalo],

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Ticket URL: <https://bugs.sugarlabs.org/ticket/4889#comment:5>
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