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Choose an appropriate display object.
ActionScript 3.0 includes a large set of display objects. One
of the most simple optimization tips to limit memory usage is to
use the appropriate type of display object. For simple shapes that
are not interactive, use Shape objects. For interactive objects
that don’t need a timeline, use Sprite objects. For animation that uses
a timeline, use MovieClip objects. Always choose the most efficient
type of object for your application.
The following code shows memory usage for different display objects:
trace(getSize(new Shape()));
// output: 236
trace(getSize(new Sprite()));
// output: 412
trace(getSize(new MovieClip()));
// output: 440
The
getSize()
method shows how many bytes an
object consumes in memory. You can see that using multiple MovieClip
objects instead of simple Shape objects can waste memory if the
capabilities of a MovieClip object are not needed.
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