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Re:Dramatically reduced power usage in Firefox 70 on macOS w... by xenadu02 on Tuesday October 22, 2019 @11:13AM (#21324528)
Do you have an FB number for improving the documentation here?

CALayer accepts a number of different data types for its contents property, IOSurface being one of them.

Another tip: CAShapeLayer draws on the GPU so simple shapes/strokes can be insanely faster drawn that way vs CoreGraphics.

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