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You can make your HTML canvas rendering faster by using typed arrays as described here https://hacks.mozilla.org/2011/12/faster-canvas-pixel-manipu...

Oh thank you! I will have a look

Don't know if you are doing it but another common optimisation is to draw on canvas offscreen. https://developer.mozilla.org/en-US/docs/Web/API/OffscreenCa...

I will work on it when I have time. The offscreen looks like the perfect fit for me, to replace the hidden canvas. Many thanks