With Discrete graphics card enabled on MBP 16" with Retina display and macOS 10.15.6, SwingMark numbers are greater (indicating lower performance) for Metal as compared to OpenGL.


OpenGL : javax.swing.plaf.metal.MetalLookAndFeel
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Startup Time: 990
Sub-Menus = 252 (Paint = 0)
TextArea = 592 (Paint = 693)
Sliders = 643 (Paint = 502)
Lists = 367 (Paint = 493)
Table Rows = 384 (Paint = 213)
Tree = 709 (Paint = 814)
Score: 4039

Metal : javax.swing.plaf.metal.MetalLookAndFeel
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Startup Time: 1238
Sub-Menus = 204 (Paint = 0)
TextArea = 637 (Paint = 693)
Sliders = 1038 (Paint = 502)
Lists = 373 (Paint = 493)
Table Rows = 477 (Paint = 213)
Tree = 1177 (Paint = 814)
Score: 5239




OpenGL : javax.swing.plaf.nimbus.NimbusLookAndFeel
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Startup Time: 1008
Sub-Menus = 1170 (Paint = 0)
TextArea = 423 (Paint = 602)
Sliders = 923 (Paint = 502)
Lists = 352 (Paint = 493)
Table Rows = 401 (Paint = 212)
Tree = 648 (Paint = 814)
Score: 5050


Metal : javax.swing.plaf.nimbus.NimbusLookAndFeel
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Startup Time: 1248
Sub-Menus = 1515 (Paint = 0)
TextArea = 585 (Paint = 602)
Sliders = 885 (Paint = 502)
Lists = 361 (Paint = 493)
Table Rows = 500 (Paint = 212)
Tree = 1242 (Paint = 814)
Score: 6468