Frequent repaints cause high CPU load on macOS

It’s possible that macOS is repainting more than required. Please see the discussion about the new rendering options in JUCE 7 and give JUCE_COREGRAPHICS_RENDER_WITH_MULTIPLE_PAINT_CALLS a go to see if it addresses the problem.

https://github.com/juce-framework/JUCE/blob/juce7/BREAKING-CHANGES.txt

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