2015-10-11 22:21 GMT+02:00 Henrik Nergaard <henrin10@student.uia.no>:

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It looks like the taskbarThumbnails might be leaking memory.

When moving the mouse across the taskbar viewing the different thumbnails the memory usage increases by quite a lot (viewed in the taskmanager (Windows) ).

I made an example script to illustrate the resource usage.

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Test scenario: 20 windows;

1 Playground, 19 Nautilus browsers (these are minimized).

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=============== Create Test Scenario ========================

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19 timesRepeat: [

�� Nautilus openOnClass: Object.

�� World doOneCycle.

].

World doOneCycle.

World submorphs

�� select: [ :m |

�� m isKindOf: NautilusWindow

�� ]

�� thenDo: [ :m | m minimize�� ]

===== Enumerate the mouse moving from one taskbarButton to the next =======

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| delay |

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delay := [ :msToWait |

�� | t |

�� t := Time now asMilliSeconds.

�� [ (Time now asMilliSeconds - t) < msToWait ]

�� whileTrue: [ World doOneCycle ].

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].

20 timesRepeat: [

�� World submorphs

�� detect: [:m | m isTaskbar ]

�� ifFound: [ :taskbar |

�� taskbar orderedTasks collect: [ :task |

�� task morph

�� ]

�� thenDo: [ :morph |

�� | button |

�� button := (taskbar taskButtonOf: morph).

�� morph taskbarButtonEntered: button event: nil in: nil.

�� delay value: 100.

�� morph taskbarButtonLeft: button event: nil in: nil.

�� delay value: 100

�� ]

�� ].

�� Smalltalk garbageCollect.

].

============================================================

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Results: (Newest Win vm -> Image 50377)

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opening the 20 Windows RAM used is 70MB.

1 iteration: 93MB

20 iterations: 130MB \ 190 MB when garbageCollect is commented out.

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Should the resource usage be that high?

No, this looks bad.

Maybe this is because every thumbnail creates a new form to draw on. This is not

needed in this case, as there is only one thumbnail view visible at time.

But I doubt that this is the reason, because we are creating Forms all over the place

and the thumbnail view forms aren't special.

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(a taskbarThumbnail is deleted before the next one is shown...)

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Best regards,

Henrik

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