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Editorial Team
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Asked: 2026-05-24T01:57:01+00:00

Is there a performance and/or memory usage difference between these two scenarios? scenario 1:

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Is there a performance and/or memory usage difference between these two scenarios?

scenario 1: N visual elements all added to stage; N-1 have visible = false, 1 has visible = true;

scenario 2: N visual elements, only 1 added to the stage at any time.

thx!

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1 Answer

  1. Editorial Team

    Visible = false is far faster.

    Colin Moock has weighed in on this issue in a definitive manner.
    His findings:

    10000 removeChild() calls took 300ms, whereas 10000 visible
    assignments took 7ms.

    His basic guidelines are :

    • removeChild() – for predictable control of the display list, add and remove.
    • visible=false – for straight up performance, visible is clearly faster;

    As far as “predictability” is concerned, we often use the display list as a stack to identify and control display objects. If you are leveraging visibility, you loose that state (which can be a big deal). Conclusively, though, if performance is required the winner is clear.

    I realize your post is directed at Flex but I think, in this case, we’re talking the behavior of an SWF and so flex/flash shouldn’t matter.

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