erformance impact</h2>
<p>Adding an additional surface doubles the amount of graphics memory directly used by Flutter
for output buffers. Quartz might allocated extra buffers for compositing the Flutter surfaces
and the platform view.</p>
<p>With a platform view in the scene, Quartz has to composite the two Flutter surfaces and the
embedded UIView. In addition to that, on iOS versions greater than 9, the Flutter frames are
synchronized with the UIView frames adding additional performance overhead.</p>
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