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UXP/layout
Moonchild 0db18745f4 Issue #2364 - Limit the growth of scaling for animated nsDisplayTransform in the fallback case.
This ensures we don't scale the underlying size of the layer beyond what
is close to the current display size. When box shadows get much larger
than this, they start taking so much time to render that successive
frames grow in scale too fast for any inter-frame reuse to be possible.

With this, we avoid that and no longer get crushed by re-rendering
gigantic box shadows every single frame.

See BZ 1383825
2023-11-04 11:41:44 +08:00
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