Bug 1789268 made a huge difference! We are slower than Chrome, but still quite usable. FWIW, gpu-canvas gets a much bigger boost than d2d-canvas.
Bug 1800801 Comment 4 Edit History
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Bug 1789268 made a huge difference! We are slower than Chrome, but still quite usable. FWIW, gpu-canvas gets a much bigger boost than d2d-canvas. gpu-canvas: https://share.firefox.dev/3FgqjLU