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I don't understand why it is only for <100x100 images. Isn't the blurring useful for larger images? what's the point of inlining small ones?

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Probably because the algorithm is really slow and you’re already producing a really small image so scaling your original image down before isn’t too much work

Blurhash is really slow on larger images but quick with small <500x500 images

Thanks, even if I'm not the one who asked. I guess the longer version of your answer would be "if you have larger input, just downscale first". And for the quality demands, you wouldn't even miss any antialiasing, just sample every nth pixel for a n00xn00 image, should really be good enough.

I wonder if it might be nice to allocate some more bytes to the center than to the edges/corners? Or is this already done?

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